The Agriculture Resource Library

The comprehensive, curated, liveness-tracked map of agricultural knowledge: organizations, data, standards, open source, inputs, suppliers, learning, funding, events, and more.

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412 entries

4-H STEM programs

University program

  • Active
  • Free

STEM is a first-class 4-H program area, with maker curriculum and a find-your-local-club tool through county Extension.

The farm kid's on-ramp to electronics and building, with tools and mentors already in your county.

Visit ↗

Checked Aug 30, 2026

AAPCO state lead agency directory

Organization

  • Active
  • Free

The association of state pesticide regulators, with the directory of every State Lead Agency.

Who actually enforces pesticide law in your state, and who takes the drift complaint.

Visit ↗

Checked Aug 30, 2026

AAPFCO

Organization

  • Active
  • Free

The association of state fertilizer regulators. There is no federal fertilizer registration; it is all state law, and AAPFCO writes the model rules behind every bag label.

What the guaranteed analysis and derived-from statement legally mean, and who your state control official is.

Visit ↗

Checked Aug 30, 2026

Acres U.S.A.

Publication / media

  • Active
  • Paid

The oldest publisher on production-scale organic and regenerative farming, since 1971, with a book catalog that is a standing reference library.

Fifty years of eco-agriculture depth; sample it free at EcoFarmingDaily.

Visit ↗

Checked Aug 30, 2026

Acres U.S.A. Eco-Ag Conference

Event

  • Active
  • Paid

The December eco-agriculture conference, nearly fifty years running.

The regenerative old guard and new guard in one hall.

Visit ↗

Checked Aug 30, 2026

ADAPT

Standard

  • Active
  • Free

The open toolkit and newer JSON standard for reading mixed-fleet precision ag data without writing a parser per equipment brand.

The de facto way your yield and as-applied files become portable.

Visit ↗

Checked Aug 30, 2026

Ag Data Coalition

Organization

  • Active
  • Paid

The farmer-centric neutral data repository founded by universities and farm organizations: store your machine data where you control the sharing.

A working example of a farmer-owned data bank.

Visit ↗

Checked Aug 30, 2026

Ag Data Transparent

Organization

  • Active
  • Free

The certification that an ag-tech vendor's data contract matches the industry's core principles, plus a free model data-use agreement.

The quickest way to learn to read a farm-data contract before signing one.

Visit ↗

Checked Aug 30, 2026

AgFunder News

Publication / media

  • Active
  • Free

The news desk of agrifood-tech investment, editorially independent of the VC firm behind it, with the annual investment report the whole sector cites.

See which technologies are getting funded before they show up at the farm store.

Visit ↗

Checked Aug 30, 2026

AgGateway

Organization

  • Active
  • Freemium

The industry consortium for digital agriculture connectivity, umbrella over ADAPT, Modus, and PAIL. The specs are free on GitHub with open technical discussion; committee votes cost membership.

The standards your farm data will eventually travel on, readable free.

Visit ↗

Checked Aug 30, 2026

AgIsoStack++

Software tool

  • Active
  • Free

The only open ISOBUS implementation: a free CAN stack in C++, Arduino, and Rust that lets homemade electronics talk to real tractor equipment.

The key to your tractor's data bus without an OEM toll booth.

Visit ↗

Checked Aug 30, 2026

AgML

Dataset

  • Active
  • Free

One loader for the public agricultural machine-learning datasets, benchmarks included, millions of labeled images.

If you are training a model on crops, start here instead of scavenging.

Visit ↗

Checked Aug 30, 2026

AgOpenGPS

Software tool

  • Active
  • Free

Centimeter-accurate tractor autosteer farmers build themselves from off-the-shelf GPS and electronics: a decade of development and probably the most vibrant farmer-built software community anywhere.

Precision guidance for hundreds of dollars instead of tens of thousands, with a forum full of farmers who wired theirs.

Visit ↗

Checked Aug 30, 2026

agrirouter

Standard

  • Active
  • Free

The manufacturer-neutral data hub connecting machines and ag software across a hundred-plus companies, free for farmers; interoperability between vendor clouds rather than local sovereignty.

Cross-brand data routing today, with eyes open about where your copy lives.

Visit ↗

Checked Aug 30, 2026

Agritecture

Organization

  • Active
  • Freemium

The consultancy and media hub for urban and vertical farming: blog, industry census, and farm-planning software.

Sharp commercial analysis of what pencils out indoors and what does not.

Visit ↗

Checked Aug 30, 2026

AGROVOC

Standard

  • Active
  • Free

FAO's multilingual agricultural thesaurus: forty thousand concepts with stable identifiers, the closest thing to a universal ag vocabulary.

Canonical term identifiers if you are organizing agricultural knowledge, as we do.

Visit ↗

Checked Aug 30, 2026

AgStack (Linux Foundation)

Organization

  • Active
  • Free

The Linux Foundation's digital public infrastructure for agriculture: open field-boundary identifiers, weather services, and since late 2025 the merged OpenAgri toolset.

Vendor-free building blocks, like a field ID no company owns.

Visit ↗

Checked Aug 30, 2026

American Beekeeping Federation

Organization

  • Active
  • Paid

The eighty-year-old federation for all beekeepers: conference, webinars, and mentorship for sideliners and hobbyists.

The national bee community, from two hives to two thousand.

Visit ↗

Checked Aug 30, 2026

American Community Gardening Association

Organization

  • Active
  • Freemium

The binational community-gardening nonprofit since 1978: garden-organizing toolkits, insurance guidance, and an annual conference.

How to start and keep a community garden without learning every lesson the hard way.

Visit ↗

Checked Aug 30, 2026

American Dairy Goat Association

Organization

  • Active
  • Paid

The national dairy goat registry: herd registration, DHI milk testing, and shows.

Papers and production records for the dairy goat herd.

Visit ↗

Checked Aug 30, 2026

American Farmland Trust

Organization

  • Active
  • Free

No Farms No Food: the farmland protection nonprofit, with the Farmland Information Center and land-access resources.

Help thinking about land access, easements, and keeping farms farms.

Visit ↗

Checked Aug 30, 2026

American Honey Producers Association

Organization

  • Active
  • Paid

The association of commercial honey producers: market advocacy and pricing intelligence.

What honey is actually worth and who is fighting for that price.

Visit ↗

Checked Aug 30, 2026

American Horticultural Society

Organization

  • Active
  • Freemium

The member gardening society since 1922: The American Gardener magazine and reciprocal garden admissions.

The genteel wing of American horticulture, with a good magazine.

Visit ↗

Checked Aug 30, 2026

American Mushroom Institute

Organization

  • Active
  • Freemium

The trade association of US mushroom growers since 1955: growing practices and Mushroom News.

The commercial mushroom industry's home base.

Visit ↗

Checked Aug 30, 2026

American Pastured Poultry Producers Association

Organization

  • Active
  • Paid

The nonprofit for poultry raised on pasture: the Grit newsletter, processing and marketing know-how, and pastured standards.

Everything the pastured-poultry model has learned, from people doing it for a living.

Visit ↗

Checked Aug 30, 2026

American Public Gardens Association

Organization

  • Active
  • Freemium

The association of botanic gardens and arboreta: partnership and education resources.

The demonstration-garden world, useful for education partnerships.

Visit ↗

Checked Aug 30, 2026

American Rabbit Breeders Association

Organization

  • Active
  • Paid

The national rabbit breeder registry and association: breed standards and a local club network.

The rabbit world's registry and its people.

Visit ↗

Checked Aug 30, 2026

AmericanHort

Organization

  • Active
  • Freemium

The largest US nursery, greenhouse, and garden-retail trade association, home of the Cultivate conference every July.

The horticulture industry's big tent and its biggest annual show.

Visit ↗

Checked Aug 30, 2026

AmHydro

Distributor / manufacturer

  • Active
  • Paid

One of the oldest US hydroponics firms, Arcata, California since 1984: turnkey NFT leafy-green packages and start-a-farm consulting.

A proven path from zero to commercial lettuce, education included.

Visit ↗

Checked Aug 30, 2026

AquaCrop (open source)

Software tool

  • Active
  • Free

The open Python implementation of FAO's crop-water productivity model.

Model yield against water before you commit either.

Visit ↗

Checked Aug 30, 2026

Aquaponics Association

Organization

  • Active
  • Freemium

The nonprofit for aquaponic growers of all sizes: video library, community forum, and an annual conference.

The fish-and-plants community, from backyard to commercial.

Visit ↗

Checked Aug 30, 2026

Ask Extension

Organization

  • Active
  • Free

The national ask-an-expert service that routes your question, photos included, to Extension staff.

Submit a question, get an answer from a local expert in days, free.

Visit ↗

Checked Aug 30, 2026

Association for Vertical Farming

Organization

  • Active
  • Freemium

The global nonprofit for the indoor and vertical farming industry: network, summits, and education on vertical systems.

The international vertical-farming community in one place.

Visit ↗

Checked Aug 30, 2026

Association of Specialty Cut Flower Growers

Organization

  • Active
  • Paid

The association for local cut-flower farmers: variety trials, grower forums, and The Cut Flower Quarterly.

The flower-farming community and its trial data, if blooms are your crop.

Visit ↗

Checked Aug 30, 2026

Athena Pro

Distributor / manufacturer

  • Active
  • Paid
  • Ours

Nutrient and amendment maker. We hold structured data on 3 of their products: analysis, elements, pH effect, and dosing. 1 are OMRI listed.

Run their actual products in our nutrient calculators before you buy a jug.

Visit ↗

Checked Aug 30, 2026

Atlas Greenhouse

Distributor / manufacturer

  • Active
  • Paid

The Georgia greenhouse manufacturer, forty years on: affordable freestanding and gutter-connect houses with Southern-style ventilation.

The Southeast's value manufacturer, built for heat.

Visit ↗

Checked Aug 30, 2026

ATTRA / NCAT

Organization

  • Active
  • Free

The USDA-funded sustainable agriculture information service: hundreds of practical publications, a national farm internship board, and a hotline with a human on it (1-800-346-9140).

The single best free reference shelf in sustainable agriculture, plus someone to call.

Visit ↗

Checked Aug 30, 2026

ATTRA Internship Board

Organization

  • Active
  • Free

The national sustainable-farm internship and apprenticeship listing service.

Find on-farm training, or post your farm and find help that wants to learn.

Visit ↗

Checked Aug 30, 2026

b-parasite

Hardware

  • Active
  • Free

An open-hardware soil moisture and temperature sensor that speaks Bluetooth and Zigbee straight to Home Assistant; order the board, flash it, done.

A soil sensor you can actually trust and repair, for less than the disposable ones.

Visit ↗

Checked Aug 30, 2026

Baker Creek Heirloom Seeds

Distributor / manufacturer

  • Active
  • Paid

The family heirloom specialist in Missouri with the deepest rare-variety list in the country and a legendary free catalog.

The niche crops nobody else carries, if you are hunting something unusual.

Visit ↗

Checked Aug 30, 2026

Bartlett Instrument

Distributor / manufacturer

  • Active
  • Paid

The Iowa family controls maker, seventy-five years on: genuinely affordable greenhouse controllers sized for small growers. Also famous, oddly, for kiln controllers. Phone orders at present.

A real greenhouse controller without the commercial-scale price.

Visit ↗

Checked Aug 30, 2026

BCS America

Distributor / manufacturer

  • Active
  • Paid

The US importer of Italian BCS two-wheel tractors: one power unit that runs a tiller, flail, rotary plow, and snowblower, sold through dealers.

The backbone machine of farms under three acres.

Visit ↗

Checked Aug 30, 2026

BeardedTinker

Publication / media

  • Active
  • Free

The one established maker channel running a sustained Home Assistant automate-my-land arc in 2026: vineyard, rain tanks, watering.

Watch HA meet actual land, weekly.

Visit ↗

Checked Aug 30, 2026

Berry Hill Irrigation

Distributor / manufacturer

  • Active
  • Paid

The family Virginia irrigation supplier, thirty-five years on: drip, plastic mulch, and a human on the phone at 1-800-345-DRIP.

Call and talk to someone who has actually grown under plastic.

Visit ↗

Checked Aug 30, 2026

BFG Supply

Distributor / manufacturer

  • Active
  • Paid

The major Ohio horticultural distributor; small growers usually touch BFG through its retail arm, Greenhouse Megastore.

Wholesale supply across the Midwest and East, dealer-style.

Visit ↗

Checked Aug 30, 2026

BPIA (Biological Products Industry Alliance)

Organization

  • Active
  • Free

The trade association for biopesticide and biostimulant makers, with educational webinars on how biologicals actually work. Industry perspective.

Track the biologicals category as it grows up.

Visit ↗

Checked Aug 30, 2026

BrAPI (Breeding API)

Standard

  • Active
  • Free

The community REST standard for plant breeding and phenotyping data, adopted by a hundred-plus institutions: a model of how an open ag API should be governed.

If you touch variety-trial data, this is its lingua franca.

Visit ↗

Checked Aug 30, 2026

Bruce Bugbee / Apogee Instruments channel

Publication / media

  • Active
  • Free

Measurement science for growers: PAR, soil moisture, and Bugbee's lighting lectures, rigorous and active.

University-grade instruction on measuring light and water, free from an instrument maker.

Visit ↗

Checked Aug 30, 2026

Bugwood Image Database

Dataset

  • Active
  • Free

Three hundred thousand curated, identification-verified photos of pests, diseases, and weeds.

Compare your mystery damage against verified reference photos.

Visit ↗

Checked Aug 30, 2026

BWI Companies

Distributor / manufacturer

  • Active
  • Paid

The Texas wholesale distributor, twenty branches, behind many Southern farm stores; wholesale accounts only.

The supply chain your local farm store probably rides on.

Visit ↗

Checked Aug 30, 2026

Calculators: Air, climate & CO2 (11)

Software tool

  • Active
  • Free
  • Ours

11 free tools for air, climate & co2, including Air Exchange Rate Calculator (ACH), Climate Zone Classifier, CO₂ Enrichment Calculator.

Pick the tool shaped like your question and run it in the browser.

Visit ↗

Checked Aug 30, 2026

Calculators: Bees & pollinators (7)

Software tool

  • Active
  • Free
  • Ours

7 free tools for bees & pollinators, including Apiary Site Survey, Bee Disease & Pest Reference, Bee Forage Selector.

Pick the tool shaped like your question and run it in the browser.

Visit ↗

Checked Aug 30, 2026

Calculators: Business, energy & compliance (7)

Software tool

  • Active
  • Free
  • Ours

7 free tools for business, energy & compliance, including Cultivation Carbon Footprint Estimator, Compliance Readiness Checker, Cycle Cost-of-Goods-Sold Calculator.

Pick the tool shaped like your question and run it in the browser.

Visit ↗

Checked Aug 30, 2026

Calculators: Crops & cultivars (5)

Software tool

  • Active
  • Free
  • Ours

5 free tools for crops & cultivars, including Crop Risk Assessment, Cultivar Browser, Disease Resistance Lookup.

Pick the tool shaped like your question and run it in the browser.

Visit ↗

Checked Aug 30, 2026

Calculators: Field, beds & planting (14)

Software tool

  • Active
  • Free
  • Ours

14 free tools for field, beds & planting, including Companion Planting Reference, Cover Crop Selector, Field Border / Hedgerow Designer.

Pick the tool shaped like your question and run it in the browser.

Visit ↗

Checked Aug 30, 2026

Calculators: Light & photoperiod (13)

Software tool

  • Active
  • Free
  • Ours

13 free tools for light & photoperiod, including Cost-per-DLI Calculator, Daylight Calculator, Day/Night DIF Designer.

Pick the tool shaped like your question and run it in the browser.

Visit ↗

Checked Aug 30, 2026

Calculators: Livestock & pasture (9)

Software tool

  • Active
  • Free
  • Ours

9 free tools for livestock & pasture, including Animal Birth & Hatch Calendar, Brooder & Hatchery Calculator, Egg Production Estimator.

Pick the tool shaped like your question and run it in the browser.

Visit ↗

Checked Aug 30, 2026

Calculators: Mushrooms & aquaculture (5)

Software tool

  • Active
  • Free
  • Ours

5 free tools for mushrooms & aquaculture, including Aquaculture Tank Calculator, Aquaponic Stocking Density Calculator, Mushroom Grain Spawn Recipe Calculator.

Pick the tool shaped like your question and run it in the browser.

Visit ↗

Checked Aug 30, 2026

Calculators: Plant health & IPM (4)

Software tool

  • Active
  • Free
  • Ours

4 free tools for plant health & ipm, including IPM Beneficial Insect Selector, Pathogen Pressure Forecast, Pest & Disease Identification Guide.

Pick the tool shaped like your question and run it in the browser.

Visit ↗

Checked Aug 30, 2026

Calculators: Post-harvest (3)

Software tool

  • Active
  • Free
  • Ours

3 free tools for post-harvest, including Drying & Curing Schedule Designer, Drying & Curing Yield Loss Calculator, Winter Storage Calculator.

Pick the tool shaped like your question and run it in the browser.

Visit ↗

Checked Aug 30, 2026

Calculators: Sensors & monitoring (3)

Software tool

  • Active
  • Free
  • Ours

3 free tools for sensors & monitoring, including Camera Resolution Calculator, Hardware Build Configs, Sensor Comparison.

Pick the tool shaped like your question and run it in the browser.

Visit ↗

Checked Aug 30, 2026

Calculators: Specialty crops (6)

Software tool

  • Active
  • Free
  • Ours

6 free tools for specialty crops, including Cut Flower Production Math, Hop Trellis Planner, Maple Syrup Production Estimator.

Pick the tool shaped like your question and run it in the browser.

Visit ↗

Checked Aug 30, 2026

Calculators: Structures, greenhouse & energy (21)

Software tool

  • Active
  • Free
  • Ours

21 free tools for structures, greenhouse & energy, including Battery Bank Sizing Calculator, Grow Room Capacity Calculator, Composting Toilet & Humanure Designer.

Pick the tool shaped like your question and run it in the browser.

Visit ↗

Checked Aug 30, 2026

Calculators: Substrate & soil (12)

Software tool

  • Active
  • Free
  • Ours

12 free tools for substrate & soil, including Soil Amendment Calculator, Compost C, Compost Pile Sizing Calculator.

Pick the tool shaped like your question and run it in the browser.

Visit ↗

Checked Aug 30, 2026

Calculators: Uncategorized (1)

Software tool

  • Active
  • Free
  • Ours

1 free tools for uncategorized, including tier-assessment.

Pick the tool shaped like your question and run it in the browser.

Visit ↗

Checked Aug 30, 2026

Calculators: Water, nutrients & feed (13)

Software tool

  • Active
  • Free
  • Ours

13 free tools for water, nutrients & feed, including Brix Refractometer Guide, Tank-Mix Compatibility Checker, Compound Lookup.

Pick the tool shaped like your question and run it in the browser.

Visit ↗

Checked Aug 30, 2026

California DPR product database

Dataset

  • Active
  • Free

California's pesticide product database, the most extensively documented state system in the country, updated weekly.

California growers verify registration here; everyone else uses it as the deepest free product research tool.

Visit ↗

Checked Aug 30, 2026

California Lightworks

Distributor / manufacturer

  • Active
  • Paid
  • Ours

Grow light maker. We hold verified fixture specs for 1 of their lights: PPF, efficacy, power, coverage, with provenance.

Compare their real fixture numbers in our lighting tools before you spend.

Visit ↗

Checked Aug 30, 2026

Capital Press

Publication / media

  • Active
  • Paid

The Western agriculture weekly covering Oregon, Washington, Idaho, and California.

The West's farm news of record.

Visit ↗

Checked Aug 30, 2026

Cardinal Scale / Detecto

Distributor / manufacturer

  • Active
  • Paid
  • Link unresponsive at last check

The family Missouri scale manufacturer: legal-for-trade market scales, sold through dealers.

The certified scale you need before the farmers-market inspector asks.

Visit ↗

Checked Aug 30, 2026

CDMS Label Database

Dataset

  • Active
  • Free

Manufacturer-fed labels and safety data sheets, including supplemental labels. Same caveat as Greenbook: industry convenience, official label authoritative.

Fast PDFs for the spray-shed binder.

Visit ↗

Checked Aug 30, 2026

CEA Alliance

Organization

  • Active
  • Freemium

The trade association of US vertical farms and high-tech greenhouse produce growers: best practices and food safety guidance for indoor produce.

The industry's own playbook for growing food indoors safely and at scale.

Visit ↗

Checked Aug 30, 2026

CEAg World

Publication / media

  • Active
  • Free

Meister's controlled-environment agriculture desk, launched 2023, with the CEA Summit East each fall.

The dedicated CEA trade coverage as the sector matures.

Visit ↗

Checked Aug 30, 2026

Center for Rural Affairs

Organization

  • Active
  • Free

Great Plains rural advocacy nonprofit with strong beginning-farmer programs: Land Link matching and lending guides.

Beginning-farmer policy help and a matchmaking service for land.

Visit ↗

Checked Aug 30, 2026

CGIAR

Organization

  • Active
  • Free

The global network of fifteen agricultural research centers, with open-access crop research and the genebanks behind rice, maize, and potato.

The deepest open crop science on earth.

Visit ↗

Checked Aug 30, 2026

Citrus Industry

Publication / media

  • Active
  • Free

The citrus growers' magazine, Florida-centered, free, with crop forecast coverage tied to the October USDA estimate.

Citrus production coverage without a paywall.

Visit ↗

Checked Aug 30, 2026

Civil Eats

Publication / media

  • Active
  • Freemium

The nonprofit food-system newsroom: policy-aware reporting on farming and food, membership-supported.

The policy weather that eventually lands on your farm, reported early.

Visit ↗

Checked Aug 30, 2026

CleanWateR3 greenhouse water resources

University program

  • Active
  • Free

The university alliance on greenhouse and nursery irrigation water: quality, treatment, recycling, and runoff.

Diagnose water-quality trouble in recirculating systems before it wrecks a crop.

Visit ↗

Checked Aug 30, 2026

Climate Engine

Software tool

  • Active
  • Free
  • Link unresponsive at last check

On-demand maps and charts of satellite and climate data for any polygon you draw, powered by Earth Engine, no coding.

Chart drought, NDVI, and precipitation history for your exact ground.

Visit ↗

Checked Aug 30, 2026

Climate Smart Farming (Cornell)

Software tool

  • Active
  • Free

Cornell's suite of climate decision tools for Northeast farms: growing degree days, water deficit, freeze risk.

Run the water deficit calculator and know when to irrigate.

Visit ↗

Checked Aug 30, 2026

Coast of Maine

Distributor / manufacturer

  • Active
  • Paid

The Maine composter of marine residuals: lobster-and-kelp composts and organic potting soils at garden centers.

Distinctive marine-based amendments off the retail shelf.

Visit ↗

Checked Aug 30, 2026

CoCoRaHS

Community

  • Active
  • Free

The volunteer precipitation observer network: join with a forty-dollar gauge and see hyperlocal rainfall maps your neighbors report.

Rainfall truth for your neighborhood, and a citizen-science community to join.

Visit ↗

Checked Aug 30, 2026

Commodity Classic

Event

  • Active
  • Paid

The row-crop grower associations' joint convention and trade show, each late winter, rotating southern cities.

Where commodity policy, agronomy education, and the big equipment all meet.

Visit ↗

Checked Aug 30, 2026

Community Alliance with Family Farmers

Organization

  • Active
  • Free

California family-farm advocacy and technical assistance: climate-smart and food-safety guides that travel well beyond the state.

Small-farm technical help written for real small farms.

Visit ↗

Checked Aug 30, 2026

Cooperative Extension (your county office)

University program

  • Active
  • Free

The crown jewel almost nobody surfaces: a public specialist attached to a land-grant university in nearly every US county, running soil tests, diagnosing pests, and teaching workshops.

The closest thing to a personal agronomist you can have, and your taxes already paid for it.

Visit ↗

Checked Aug 30, 2026

Copernicus Browser

Dataset

  • Active
  • Free

ESA's free portal for Sentinel satellite imagery: ten meter resolution, roughly five-day revisit, with vegetation indexes built in.

NDVI of your own fields every few days, free, no GIS degree needed.

Visit ↗

Checked Aug 30, 2026

Cornell CASH soil health test

Reference work

  • Active
  • Paid

The standard comprehensive soil health assessment, biological and physical indicators included, with a free interpretation manual.

A soil test that measures health, not just fertility, and the free manual to understand it.

Visit ↗

Checked Aug 30, 2026

Cornell CEA Program

University program

  • Active
  • Free

The leading university controlled-environment agriculture group: free hydroponic crop handbooks for lettuce and spinach, lighting and energy tools.

The free handbooks commercial hydro lettuce growers actually use.

Visit ↗

Checked Aug 30, 2026

Cornell Small Farms Program

University program

  • Active
  • Freemium

Guides, structured online courses, and the Small Farms Quarterly from Cornell's small-farm team.

A real beginning-farmer curriculum, some free, courses modestly priced.

Visit ↗

Checked Aug 30, 2026

Cornell Vegetable Varieties for Gardeners

Dataset

  • Active
  • Free

The citizen-science database of vegetable variety ratings: taste, yield, and ease from real gardens.

Check the ratings before betting a season on an unknown variety.

Visit ↗

Checked Aug 30, 2026

Cornell Vegetables (commercial)

Reference work

  • Active
  • Free

Commercial variety trial results, planting dates, and disease-resistance tables.

The disease-resistant variety list for each crop, before you order seed.

Visit ↗

Checked Aug 30, 2026

Crop Ontology

Standard

  • Active
  • Free

Community-curated trait ontologies for thirty-seven crop species, used by the world's breeding platforms.

Standard trait names if you record crop observations seriously.

Visit ↗

Checked Aug 30, 2026

CropKing

Distributor / manufacturer

  • Active
  • Paid

The Ohio hydroponic greenhouse package manufacturer since 1982, with the classic two-day Grower School as the industry's on-ramp.

A complete greenhouse-plus-hydro package and the school that teaches you to run it.

Visit ↗

Checked Aug 30, 2026

CropLife America

Organization

  • Active
  • Free

The trade association of pesticide manufacturers: the industry's advocacy and communications arm. Listed here as the industry perspective, not a neutral safety reference.

What the manufacturers are advocating, from the source.

Visit ↗

Checked Aug 30, 2026

CSA Innovation Network

Community

  • Active
  • Free

The national community strengthening the CSA movement: best practices, marketing materials, and a peer network.

How the best CSAs run theirs, shared freely.

Visit ↗

Checked Aug 30, 2026

Cultivate

Event

  • Active
  • Paid

The horticulture industry's biggest annual show, each July in Columbus: production, retail, and the Medal of Excellence announcements.

The whole greenhouse trade in one building, once a year.

Visit ↗

Checked Aug 30, 2026

Cutting Edge Solutions

Distributor / manufacturer

  • Active
  • Paid
  • Ours

Nutrient and amendment maker. We hold structured data on 9 of their products: analysis, elements, pH effect, and dosing.

Run their actual products in our nutrient calculators before you buy a jug.

Visit ↗

Checked Aug 30, 2026

Cyco

Distributor / manufacturer

  • Active
  • Paid
  • Ours

Nutrient and amendment maker. We hold structured data on 3 of their products: analysis, elements, pH effect, and dosing.

Run their actual products in our nutrient calculators before you buy a jug.

Visit ↗

Checked Aug 30, 2026

Dairy Grazing Apprenticeship

Organization

  • Active
  • Free
  • Link unresponsive at last check

The first formal Department of Labor registered farming apprenticeship in the country: a paid two-year path to managing a grazing dairy.

A real trade apprenticeship, in dairy grazing, with a paycheck.

Visit ↗

Checked Aug 30, 2026

data.gov agriculture

Dataset

  • Active
  • Free

The federal open-data catalog's agriculture group: thousands of datasets, one search, with a CKAN API.

If a federal agency published it, it is findable here.

Visit ↗

Checked Aug 30, 2026

Davis Instruments

Distributor / manufacturer

  • Active
  • Paid

The weather station maker, an AEM brand since 2021, whose Vantage Pro2 is the small-farm weather standard.

The farm weather station everyone recommends first.

Visit ↗

Checked Aug 30, 2026

Down to Earth

Distributor / manufacturer

  • Active
  • Paid
  • Ours

Nutrient and amendment maker. We hold structured data on 21 of their products: analysis, elements, pH effect, and dosing. 17 are OMRI listed.

Run their actual products in our nutrient calculators before you buy a jug.

Visit ↗

Checked Aug 30, 2026

Drip Depot

Distributor / manufacturer

  • Active
  • Paid

The family-owned Oregon online drip retailer with obsessively good how-to support and small-order friendliness.

Fittings by the each, and an academy that teaches you to plumb them.

Visit ↗

Checked Aug 30, 2026

DripWorks

Distributor / manufacturer

  • Active
  • Paid

The California drip irrigation retailer, thirty years in: kits, tape, timers, and free personalized system design.

Send them your garden map and get a drip design back, free. The gentlest first-system on-ramp.

Visit ↗

Checked Aug 30, 2026

Dyna-Gro

Distributor / manufacturer

  • Active
  • Paid
  • Ours

Nutrient and amendment maker. We hold structured data on 3 of their products: analysis, elements, pH effect, and dosing. 1 are OMRI listed.

Run their actual products in our nutrient calculators before you buy a jug.

Visit ↗

Checked Aug 30, 2026

e-GRO

University program

  • Active
  • Free

The greenhouse collaborative's real-time alerts, nutritional and disease diagnostic guides, and grower apps.

Research-based alerts written for enclosed production, in season.

Visit ↗

Checked Aug 30, 2026

Earth Tools

Distributor / manufacturer

  • Active
  • Paid

The largest walk-behind tractor dealership in North America, a Kentucky family business: BCS and Grillo tractors, forty-five implement types, and encyclopedic phone support.

The de facto manual on walk-behind tractors, and a human who has run every implement.

Visit ↗

Checked Aug 30, 2026

EcoFarm Conference

Event

  • Active
  • Paid

The West Coast's ecological farming gathering, each January at Pacific Grove, California, running since 1981.

The West's organic winter meeting, ocean included.

Visit ↗

Checked Aug 30, 2026

EDDMapS

Dataset

  • Active
  • Free

The early detection and mapping system for invasive species: see what is confirmed in your county and report sightings.

Which invasives have reached your county, mapped.

Visit ↗

Checked Aug 30, 2026

eOrganic

University program

  • Active
  • Free

The national online organic agriculture community of practice: peer-reviewed articles, a webinar archive, and a video library.

University-vetted organic answers, the counterpart to ATTRA.

Visit ↗

Checked Aug 30, 2026

EPA Bulletins Live! Two

Dataset

  • Active
  • Free

EPA's map of geographically specific, legally enforceable pesticide use limitations for endangered species. When a label says check Bulletins Live, the bulletin is part of the label.

The enforceable local restrictions for your county and month, increasingly referenced since 2024.

Visit ↗

Checked Aug 30, 2026

EPA minimum risk pesticides (25(b))

Reference work

  • Active
  • Free

Why that cedar-oil product has no EPA number: the exempt minimum-risk class, explained, with the allowed ingredient lists. Most states still require state registration of these.

Sanity-check the natural products before you rely on them.

Visit ↗

Checked Aug 30, 2026

EPA pesticide discharge permitting tool

Software tool

  • Active
  • Free

The interactive answer to whether your pesticide use needs a Clean Water Act permit. For normal field application, it does not; ponds and ditches change things.

Peace of mind, or fair warning, in ten minutes of clicking.

Visit ↗

Checked Aug 30, 2026

EPA Worker Protection Standard manual

Reference work

  • Active
  • Free

The plain-language federal manual for the Worker Protection Standard, explicitly covering greenhouses and mushroom houses, with the owner-and-immediate-family exemption spelled out.

Figure out which duties actually apply to your operation; many homesteads are exempt.

Visit ↗

Checked Aug 30, 2026

ePackageSupply

Distributor / manufacturer

  • Active
  • Paid

The veteran-owned Indiana food-grade container retailer with no minimums on stock items.

Buckets and deli cups by the each, not the case.

Visit ↗

Checked Aug 30, 2026

EPPO codes

Standard

  • Active
  • Free

The five-letter codes for plants, pests, and pathogens used in labels, spray records, and machine data everywhere.

The universal species shorthand, free to look up.

Visit ↗

Checked Aug 30, 2026

EQIP (NRCS cost-share)

Funding program

  • Active
  • Free

The Environmental Quality Incentives Program: cost-share for conservation practices including high tunnels, irrigation efficiency, and cover crops. Your NRCS field office is the front door.

The program that has paid for thousands of small growers' first high tunnel.

Visit ↗

Checked Aug 30, 2026

ESPHome

Software tool

  • Active
  • Free

Firmware for ESP32 boards written as configuration, not code: describe your sensors in YAML and flash from the browser. Ships monthly.

The gentlest path from a bare board to a working sensor node.

Visit ↗

Checked Aug 30, 2026

Experimental Farm Network

Community

  • Active
  • Free

A volunteer participatory plant-breeding network: join real breeding projects from a backyard plot.

A seat in actual crop breeding, no degree required.

Visit ↗

Checked Aug 30, 2026

Extension Foundation (extension.org)

University program

  • Active
  • Free

The national gateway into the whole Cooperative Extension system from one door.

Route into any state's land-grant resources without knowing the campus.

Visit ↗

Checked Aug 30, 2026

Extension Master Gardener programs

University program

  • Active
  • Freemium

Volunteer horticulture training run by the land-grant in every state: coursework, then service hours answering the public's plant questions.

Real training and a community, or free expert answers from those who took it.

Visit ↗

Checked Aug 30, 2026

Fablabs.io

Maker space

  • Active
  • Free

The Fab Foundation's official registry of fab labs worldwide, with each lab's machines and whether it is actually open. Over 300 labs in the US alone.

Find a lab with the 3D printer, laser cutter, or CNC you need once, and see its equipment list before you drive.

Visit ↗

Checked Aug 30, 2026

FAO

Organization

  • Active
  • Free

The UN's food and agriculture agency: FAOSTAT data for every country, crop production guides, and the canonical irrigation references.

The global picture, and reference works like FAO-56 that the whole field builds on.

Visit ↗

Checked Aug 30, 2026

FAO-56 Crop Evapotranspiration

Reference work

  • Active
  • Free

The canonical irrigation reference, free in full: Penman-Monteith reference evapotranspiration and the crop coefficients everything else builds on.

The Kc for your crop and the math behind every smart irrigation tool, from the source.

Visit ↗

Checked Aug 30, 2026

FAOSTAT

Data / API

  • Active
  • Free

FAO's global food and agriculture statistics for two hundred forty-five countries, with an API.

The world picture on any crop, for market context.

Visit ↗

Checked Aug 30, 2026

Farm Aid

Organization

  • Active
  • Free

The farmer-support nonprofit behind the concert: a crisis hotline (1-800-FARM-AID) and a farmer resource network.

A number to call when things get hard, and people who have helped farmers through it since 1985.

Visit ↗

Checked Aug 30, 2026

Farm Credit

Organization

  • Active
  • Free

The nationwide network of borrower-owned agricultural lenders, chartered a century ago for exactly this.

Ag-literate lending when you outgrow the microloan.

Visit ↗

Checked Aug 30, 2026

Farm Hack

Community

  • Active
  • Free

The farmer-driven open tool library: three hundred documented tool designs and the culture of farmers publishing what they build.

Plans for tools other farmers already proved, and a place to publish yours.

Visit ↗

Checked Aug 30, 2026

Farm Hack Open Shops

Maker space

  • Active
  • Free

Real farm shops that open their doors, indexed by skill: welding, CNC, 3D printing, Arduino programming, machining, carpentry.

The makerspace idea in farm clothes. Find a farmer nearby with the shop and the skill you need, taught in your own vocabulary.

Visit ↗

Checked Aug 30, 2026

Farm Progress Show

Event

  • Active
  • Paid

The country's biggest outdoor farm show, late summer, alternating between Boone, Iowa and Decatur, Illinois, with live field demonstrations.

Equipment working in an actual field, not on carpet.

Visit ↗

Checked Aug 30, 2026

farm-ng Amiga

Hardware

  • Active
  • Paid

A modular electric farm rover with an open SDK, the platform behind the collegiate Farm Robotics Challenge. The hardware is commercial; the development surface is open.

A real rover you can program without signing an NDA.

Visit ↗

Checked Aug 30, 2026

FarmBot

Hardware

  • Active
  • Paid

The open-source CNC garden robot that seeds, waters, and weeds raised beds; hardware plans and software all free, used by five hundred schools.

A garden that tends itself, or the best robotics teaching platform agriculture has.

Visit ↗

Checked Aug 30, 2026

FarmData2

Software tool

  • Active
  • Free

Data entry and reporting for diversified vegetable farms, built on farmOS, aligned with organic certification records, and sustained by a college course.

Certification-shaped record keeping, free, from people teaching the next generation to maintain it.

Visit ↗

Checked Aug 30, 2026

Farmer Veteran Coalition

Organization

  • Active
  • Free

The nonprofit helping military veterans enter agriculture: a fellowship fund for equipment grants and the Homegrown by Heroes label.

If you served, a community and small equipment grants to get you farming.

Visit ↗

Checked Aug 30, 2026

Farmers Friend

Distributor / manufacturer

  • Active
  • Paid

The farm-born Tennessee maker of Caterpillar Tunnels, the Quick-Cut Greens Harvester, and Jang seeders, tested on their own ground.

The market-garden equipment name of the last decade, with real education behind the products.

Visit ↗

Checked Aug 30, 2026

Farmers Market Coalition

Organization

  • Active
  • Free

The national nonprofit supporting farmers markets: manager toolkits, SNAP and EBT guidance, and metrics tools.

Everything a market vendor or market manager needs to run the thing right.

Visit ↗

Checked Aug 30, 2026

farmOS

Software tool

  • Active
  • Free

The open farm record-keeping platform, twelve years of steady releases, whose data model has become a de facto open standard others build on.

Farm records you own outright, on software nobody can take away or subscription-trap you with.

Visit ↗

Checked Aug 30, 2026

FarmTek / GrowSpan / ClearSpan

Distributor / manufacturer

  • Active
  • Paid

One company, several brand names: FarmTek the catalog, GrowSpan the greenhouses, ClearSpan the big fabric buildings, plus hydroponic fodder systems. Not the same company as ShelterLogic.

Hoop barns to fodder racks in one catalog, once you decode the brand family.

Visit ↗

Checked Aug 30, 2026

FarmVibes.AI

Software tool

  • Active
  • Free

Microsoft Research's open geospatial and ag model toolkit: serious satellite and weather fusion workflows, freely licensed.

Big-company research tooling, open on the shelf for anyone technical enough to lift it.

Visit ↗

Checked Aug 30, 2026

FDA FSMA raw manure rules

Reference work

  • Active
  • Free

The federal food-safety rules for biological soil amendments, with the manure application-to-harvest intervals.

Know the ninety and one-twenty day manure intervals, and whether your farm is even covered; many small farms are exempt.

Visit ↗

Checked Aug 30, 2026

Fedco Seeds

Distributor / manufacturer

  • Active
  • Paid

The Maine consumer and worker co-op: cheap, honest, cold-climate-proven seed, trees, and organic supplies, in a newsprint catalog with opinions. Seasonal ordering windows; plan ahead.

The best seed value in the Northeast, from a co-op that answers to its members.

Visit ↗

Checked Aug 30, 2026

fiboa field boundaries

Standard

  • Active
  • Free

The young open schema for field-boundary data, GeoJSON and GeoParquet flavored, from the open geospatial community.

An open way to describe where your fields are that no vendor owns.

Visit ↗

Checked Aug 30, 2026

Fields2Cover

Software tool

  • Active
  • Free

The open coverage-path-planning library for farm vehicles: how a robot decides to drive a field.

A standard building block if you are pointing anything autonomous at a paddock.

Visit ↗

Checked Aug 30, 2026

FieldWatch (DriftWatch and BeeCheck)

Dataset

  • Active
  • Free

The national map registry of specialty crop fields and apiaries that commercial spray applicators check before they spray, covering about twenty-seven states.

Register your farm and hives so the sprayer sees you first. The highest-leverage free action near row-crop country.

Visit ↗

Checked Aug 30, 2026

FieldWatch registration

Organization

  • Active
  • Free

The registration side of the FieldWatch map: put your specialty crops on DriftWatch and your hives on BeeCheck so applicators see you before they spray.

The single highest-leverage free protective action for a small grower near row-crop country.

Visit ↗

Checked Aug 30, 2026

FIRA USA

Event

  • Active
  • Paid

The agricultural robotics show, each fall in California: the machines that will weed for you, walking the rows.

Ag autonomy in person before you read about it.

Visit ↗

Checked Aug 30, 2026

Florikan

Distributor / manufacturer

  • Active
  • Paid
  • Ours

Nutrient and amendment maker. We hold structured data on 19 of their products: analysis, elements, pH effect, and dosing.

Run their actual products in our nutrient calculators before you buy a jug.

Visit ↗

Checked Aug 30, 2026

Fluence

Distributor / manufacturer

  • Active
  • Paid
  • Ours

Grow light maker. We hold verified fixture specs for 2 of their lights: PPF, efficacy, power, coverage, with provenance.

Compare their real fixture numbers in our lighting tools before you spend.

Visit ↗

Checked Aug 30, 2026

Foundation for Food and Agriculture Research

Organization

  • Active
  • Free

The congressionally created nonprofit funding public-private agricultural research.

A window on where ag research money is flowing next.

Visit ↗

Checked Aug 30, 2026

Fox Farm

Distributor / manufacturer

  • Active
  • Paid
  • Ours

Nutrient and amendment maker. We hold structured data on 15 of their products: analysis, elements, pH effect, and dosing. 5 are OMRI listed.

Run their actual products in our nutrient calculators before you buy a jug.

Visit ↗

Checked Aug 30, 2026

FreshPlaza and family

Publication / media

  • Active
  • Free

The free daily global fresh-produce trade wire, with sister dailies HortiDaily for greenhouse horticulture and VerticalFarmDaily for indoor.

The world's produce trade, free, every morning.

Visit ↗

Checked Aug 30, 2026

FSA farm loans and microloans

Funding program

  • Active
  • Free

The Farm Service Agency lends where banks often will not: streamlined microloans for a market garden or first season, and beginning-farmer loans that lower the bar.

Capital designed for exactly the farm the banks call too small.

Visit ↗

Checked Aug 30, 2026

GARDIAN

Dataset

  • Active
  • Free

The pan-CGIAR search engine over a hundred thousand publications and thousands of datasets from fifteen research centers.

Global crop research data, one search.

Visit ↗

Checked Aug 30, 2026

Gavita

Distributor / manufacturer

  • Active
  • Paid
  • Ours

Grow light maker. We hold verified fixture specs for 5 of their lights: PPF, efficacy, power, coverage, with provenance.

Compare their real fixture numbers in our lighting tools before you spend.

Visit ↗

Checked Aug 30, 2026

Glacier Valley Enterprises

Distributor / manufacturer

  • Active
  • Paid

The Wisconsin produce packaging and farm-market supplier: berry tills, clamshells, pulp trays, and market signage in farm-stand quantities. Their old dot-com domain is parked; this is the real one.

Packaging in the quantities a farm stand actually needs.

Visit ↗

Checked Aug 30, 2026

GLASE Consortium

University program

  • Active
  • Free

The Cornell and RPI consortium on greenhouse lighting and controls, with an online course catalog and published research.

University-grade greenhouse lighting knowledge without enrolling.

Visit ↗

Checked Aug 30, 2026

GOAT (Gathering for Open Agricultural Technology)

Community

  • Active
  • Free

The commons of open agricultural technology: a forum where the farmOS, OpenTEAM, and farm-hacker worlds meet, and a biennial gathering (next: December 2026, Seabrook Island, South Carolina).

The watering hole. If you build open tools for farms, these are your people.

Visit ↗

Checked Aug 30, 2026

GOAT gathering

Event

  • Active
  • Freemium

The biennial unconference of open agricultural technology; next edition December 2026 at Seabrook Island, South Carolina.

Every open-ag builder in one room, every other year.

Visit ↗

Checked Aug 30, 2026

Good Fruit Grower

Publication / media

  • Active
  • Paid

The tree fruit and grape growers' magazine since 1946, association-owned, print sub gates the digital issues but much of the web is free.

The orchard trade's serious journalism, and a free weekly digest.

Visit ↗

Checked Aug 30, 2026

GOSH (Gathering for Open Science Hardware)

Community

  • Active
  • Free

The global open science hardware community, the adjacent gene pool the open ag sensing world draws from.

Where scientific instruments get opened up, often years before farming notices.

Visit ↗

Checked Aug 30, 2026

Gothic Arch Greenhouses

Distributor / manufacturer

  • Active
  • Paid

One of the oldest names in hobby and small-commercial greenhouses, family-run in Mobile, Alabama since 1946, with design help across a huge range.

Somebody who has been selling greenhouses since before plastic film, helping you pick one.

Visit ↗

Checked Aug 30, 2026

Grants.gov

Dataset

  • Active
  • Free

Every federal grant opportunity in one searchable place, with open data behind it. The agency field office is usually the better first call, but this is the master list.

The complete federal funding firehose, filterable.

Visit ↗

Checked Aug 30, 2026

Grassfed Exchange

Event

  • Active
  • Paid

The grassfed livestock conference and ranch tours, held around the country each year.

Graziers comparing notes, pasture walks included.

Visit ↗

Checked Aug 30, 2026

Great Lakes EXPO

Event

  • Active
  • Paid

The Midwest's big December show for vegetable, fruit, and farm-market growers in Grand Rapids.

The Midwest specialty-crop winter meeting, education tracks and all.

Visit ↗

Checked Aug 30, 2026

Greenbook

Dataset

  • Active
  • Free

An industry-maintained label and safety-data-sheet database searchable by crop, pest, and active ingredient. Convenient, but the EPA and state label remain the authority.

Season planning: find what is labeled for aphids on lettuce, then verify against the official label.

Visit ↗

Checked Aug 30, 2026

Greenhorns

Community

  • Active
  • Free

The grassroots cultural organization for young agrarians: the New Farmer's Almanac, a huge free resource list, and radio.

Culture and connection for the new-farmer movement, and one of the best link lists in agriculture.

Visit ↗

Checked Aug 30, 2026

Greenhouse Grower

Publication / media

  • Active
  • Free

The trade magazine of commercial greenhouse growing, and publisher of the annual Top 100 Growers ranking, the most cited scale benchmark in the business.

Industry trends free, and every May the map of who is biggest.

Visit ↗

Checked Aug 30, 2026

Greenhouse Megastore

Distributor / manufacturer

  • Active
  • Paid

The retail-friendly online greenhouse supplier: polycarbonate, trays, shade cloth, and ground cover with no account required.

The just-sell-me-ten-trays counter, from hobby to small commercial.

Visit ↗

Checked Aug 30, 2026

Greenhouse Product News

Publication / media

  • Active
  • Free

The monthly for commercial greenhouse growers, ornamental-leaning with CEA coverage.

Another free window on the greenhouse trade, and its young-talent list.

Visit ↗

Checked Aug 30, 2026

GreenTech Amsterdam

Event

  • Active
  • Paid

The global greenhouse-technology show, each June in Amsterdam, where controlled-environment equipment debuts first.

The Dutch greenhouse world, which is to say the future of yours.

Visit ↗

Checked Aug 30, 2026

Griffin Greenhouse Supplies

Distributor / manufacturer

  • Active
  • Paid

The family horticultural distributor since 1947, fifteen distribution centers, East-leaning: media, trays, fertilizer, structures, and IPM through a wholesale account.

The big pro house; the reps genuinely know growing.

Visit ↗

Checked Aug 30, 2026

GRIN-Global germplasm system

Dataset

  • Active
  • Free

The US National Plant Germplasm System: six hundred thousand seed accessions, and yes, they will mail you samples of rare varieties for trial and breeding, free.

Request seed of landraces you cannot buy anywhere. Most growers have no idea this exists.

Visit ↗

Checked Aug 30, 2026

Grow More

Distributor / manufacturer

  • Active
  • Paid
  • Ours

Nutrient and amendment maker. We hold structured data on 27 of their products: analysis, elements, pH effect, and dosing.

Run their actual products in our nutrient calculators before you buy a jug.

Visit ↗

Checked Aug 30, 2026

Grow Recipes (oat-recipe standard)

Standard

  • Active
  • Free
  • Ours

Machine-readable grow recipes: targets by crop and stage in an open format, with a public standard behind them.

Setpoints you can load, compare, and argue with, instead of folklore.

Visit ↗

Checked Aug 30, 2026

Growers and Co.

Distributor / manufacturer

  • Active
  • Paid

The Quebec tool and workwear brand allied with Jean-Martin Fortier's Market Gardener Institute: broadforks, harvest knives, and clothing built for the work.

The Market Gardener ecosystem's tools, in a catalog that doubles as inspiration.

Visit ↗

Checked Aug 30, 2026

GrowerTalks

Publication / media

  • Active
  • Free

Ball Publishing's grower-culture magazine, with Chris Beytes' Acres Online, the best-written greenhouse newsletter going.

The greenhouse trade's voice, free, plus the wage survey everyone quotes.

Visit ↗

Checked Aug 30, 2026

Growing for Market

Publication / media

  • Active
  • Paid

The trade magazine for market farmers since 1992, ten issues a year: peer growers writing up their production and marketing in detail.

The magazine your exact peers write; worth the forty-five dollars if you sell what you grow.

Visit ↗

Checked Aug 30, 2026

Growing Produce

Publication / media

  • Active
  • Free

The home of American Vegetable Grower and American Fruit Grower: trade coverage of commercial fruit and vegetable production.

The specialty-crop trade press, free, with the annual industry survey worth reading whole.

Visit ↗

Checked Aug 30, 2026

GS1 fresh produce standards

Standard

  • Active
  • Freemium

The identification standards behind produce traceability: guidelines free to read, though issuing your own barcodes costs an annual prefix fee.

What the barcode-and-lot world will ask of you when you sell into retail.

Visit ↗

Checked Aug 30, 2026

Harris Seeds

Distributor / manufacturer

  • Active
  • Paid

The 1879 Rochester seed house that is also a legitimate small-scale supplies source: seed-starting gear, trays, and plugs with grower terms.

Seed and the stuff to start it, one order.

Visit ↗

Checked Aug 30, 2026

Heliospectra

Distributor / manufacturer

  • Active
  • Paid
  • Ours

Grow light maker. We hold verified fixture specs for 1 of their lights: PPF, efficacy, power, coverage, with provenance.

Compare their real fixture numbers in our lighting tools before you spend.

Visit ↗

Checked Aug 30, 2026

Herb Society of America

Organization

  • Active
  • Freemium

The herb education society: growing guides and plant profiles.

Herb knowledge with history behind it.

Visit ↗

Checked Aug 30, 2026

High Mowing Organic Seeds

Distributor / manufacturer

  • Active
  • Paid

The hundred-percent certified-organic seed company in Vermont, strong on disease-resistance notes.

Organic-bred genetics at commercial volumes; the second catalog on every potting bench.

Visit ↗

Checked Aug 30, 2026

Home Assistant

Software tool

  • Active
  • Free

The world's largest open home-automation platform, nonprofit-owned, and quietly the largest community on earth doing ESP32 environmental monitoring.

The place your sensors, irrigation, and greenhouse controls all come together, owned by you.

Visit ↗

Checked Aug 30, 2026

Home Assistant plant monitoring (Olen's plant + flower card)

Software tool

  • Active
  • Free

The maintained plant-monitoring pair for Home Assistant: per-plant thresholds, a database of species targets, and the flower card to show it all.

Every plant's moisture, light, and warnings on one dashboard.

Visit ↗

Checked Aug 30, 2026

Hoocho

Publication / media

  • Active
  • Free

Weekly DIY hydroponics and 3D-printed grow hardware with open designs; the closest active YouTube peer to the open-hardware growing ethos.

Buildable hydro ideas every week, plans included.

Visit ↗

Checked Aug 30, 2026

Hort Americas

Distributor / manufacturer

  • Active
  • Paid

The CEA-specialist wholesale distributor: hydroponic substrates, LED lighting, and fertilizer aimed at greenhouse vegetables, with serious free education behind it.

A distributor that publishes real agronomy, not just a price list.

Visit ↗

Checked Aug 30, 2026

Horticulture Lighting Group

Distributor / manufacturer

  • Active
  • Paid
  • Ours

Grow light maker. We hold verified fixture specs for 2 of their lights: PPF, efficacy, power, coverage, with provenance.

Compare their real fixture numbers in our lighting tools before you spend.

Visit ↗

Checked Aug 30, 2026

Hummert International

Distributor / manufacturer

  • Active
  • Paid

The family Missouri horticultural distributor, about ninety years old, whose fat everything-catalog is a reference document in its own right.

Friendly to smaller accounts, and the catalog teaches you what exists.

Visit ↗

Checked Aug 30, 2026

Husker Harvest Days

Event

  • Active
  • Paid

The big irrigated-agriculture field show, each September at Grand Island, Nebraska.

Irrigation equipment demonstrated under real center pivots.

Visit ↗

Checked Aug 30, 2026

ICAR Animal Data Exchange

Standard

  • Active
  • Free

The open JSON standards for exchanging livestock data between farm systems, milking robots, and sensors; free on GitHub even though ICAR membership is paid.

The open path into livestock sensor data, no membership required.

Visit ↗

Checked Aug 30, 2026

ICL

Distributor / manufacturer

  • Active
  • Paid
  • Ours
  • Link unresponsive at last check

Nutrient and amendment maker. We hold structured data on 40 of their products: analysis, elements, pH effect, and dosing.

Run their actual products in our nutrient calculators before you buy a jug.

Visit ↗

Checked Aug 30, 2026

IFOAM Organics International

Organization

  • Active
  • Freemium

The global umbrella for the organic movement: principles and world organic statistics.

Organic as a worldwide movement, with the numbers to show it.

Visit ↗

Checked Aug 30, 2026

IFPA Global Produce and Floral Show

Event

  • Active
  • Paid

The produce industry's giant October trade show, where retail buyers and growers of every size meet.

The buying side of your industry, all in one hall.

Visit ↗

Checked Aug 30, 2026

iGrow News

Publication / media

  • Active
  • Freemium

Daily CEA and agtech coverage with a Friday digest; not the old SDSU iGrow, and not Link4's iGrow controllers.

Deal flow and sector news for indoor growing.

Visit ↗

Checked Aug 30, 2026

iNaturalist

Community

  • Active
  • Free

The global crowdsourced species identification platform, computer vision plus experts, with an open API.

Snap any unknown insect or weed and get an identification.

Visit ↗

Checked Aug 30, 2026

Indoor Ag-Con

Event

  • Active
  • Paid

The indoor and vertical farming trade show, spring in Las Vegas.

The CEA industry's annual gathering.

Visit ↗

Checked Aug 30, 2026

IR-4 Project

University program

  • Active
  • Free

The federal and land-grant program that gets pest controls registered on specialty crops; responsible for about half of all specialty crop registrations, and it takes requests from growers.

When nothing is labeled for your crop and pest, IR-4 exists to fix exactly that. File a Project Clearance Request.

Visit ↗

Checked Aug 30, 2026

Irrigation King

Distributor / manufacturer

  • Active
  • Paid

The online irrigation discounter: budget drip tape, rain guns, and filters, house-brand heavy.

Consumables at the lowest prices when you know what you need.

Visit ↗

Checked Aug 30, 2026

Irrigation Unlimited

Software tool

  • Active
  • Free

The power-user irrigation scheduler for Home Assistant: seasons, sequences, and every edge case, actively maintained.

Irrigation scheduling with no ceiling on complexity when your system outgrows the simple ones.

Visit ↗

Checked Aug 30, 2026

ISOBUS and the AEF

Standard

  • Active
  • Free

The backbone standard of ag equipment: how tractors, implements, and software talk. The AEF's public compatibility database shows what actually interoperates; the ISO texts themselves are paywalled.

Check whether two pieces of equipment really work together before buying either.

Visit ↗

Checked Aug 30, 2026

Jack's Elementals

Distributor / manufacturer

  • Active
  • Paid
  • Ours

Nutrient and amendment maker. We hold structured data on 13 of their products: analysis, elements, pH effect, and dosing. 3 are OMRI listed.

Run their actual products in our nutrient calculators before you buy a jug.

Visit ↗

Checked Aug 30, 2026

Jacks Professional

Distributor / manufacturer

  • Active
  • Paid
  • Ours

Nutrient and amendment maker. We hold structured data on 18 of their products: analysis, elements, pH effect, and dosing.

Run their actual products in our nutrient calculators before you buy a jug.

Visit ↗

Checked Aug 30, 2026

Johnny's Grower's Library

Reference work

  • Active
  • Free

The research-team-written crop guides, planning calculators, and tech sheets behind the Johnny's catalog: the single best vendor education asset in the sector.

Succession calculators and key-growing sheets you will use every season, free.

Visit ↗

Checked Aug 30, 2026

Johnny's Selected Seeds

Distributor / manufacturer

  • Active
  • Paid

The employee-owned seed and tool house in Winslow, Maine: trialed varieties with the best cultural information in print, commercial volumes, and a free Grower's Library of calculators and charts.

The reference catalog of specialty growing; the free Grower's Library alone earns the bookmark.

Visit ↗

Checked Aug 30, 2026

JR Peters

Distributor / manufacturer

  • Active
  • Paid
  • Ours

Nutrient and amendment maker. We hold structured data on 32 of their products: analysis, elements, pH effect, and dosing.

Run their actual products in our nutrient calculators before you buy a jug.

Visit ↗

Checked Aug 30, 2026

Kelly Registration Systems

Dataset

  • Active
  • Free
  • Link unresponsive at last check

The private company that hosts the official pesticide and fertilizer registration databases for around thirty-nine state agriculture departments. Official state data, commercial plumbing.

Your state's actual registration lookup, for most states.

Visit ↗

Checked Aug 30, 2026

Kiss the Ground

Organization

  • Active
  • Freemium

The media nonprofit that made regenerative agriculture a household phrase: stewardship courses and storytelling resources.

The gentle on-ramp to regenerative thinking, good for explaining it to your customers too.

Visit ↗

Checked Aug 30, 2026

Kiva US small-business loans

Funding program

  • Active
  • Free

Zero-percent, crowdfunded small-business loans up to fifteen thousand dollars, and farms qualify.

Interest-free starter capital backed by people rooting for you.

Visit ↗

Checked Aug 30, 2026

L'Atelier Paysan (the self-build workshop model)

Community

  • Active
  • Freemium

The French cooperative movement that proved farmers can weld their own implements: open plans plus hands-on build courses. The original cooperative reorganized in 2026; the network and the plans carry on.

Open, field-proven implement plans and the model for farmer-taught workshops. French language, universal idea.

Visit ↗

Checked Aug 30, 2026

Lancaster Farming

Publication / media

  • Active
  • Paid

The Pennsylvania and mid-Atlantic farm weekly with strong small-farm and produce-auction coverage.

The best regional farm paper in the East, auction prices included.

Visit ↗

Checked Aug 30, 2026

Land For Good

Organization

  • Active
  • Free

The land-access nonprofit for farm seekers and retiring farmers, New England based, with planning tools used far beyond it.

Free land-access planning tools and advising for getting on, or passing on, a farm.

Visit ↗

Checked Aug 30, 2026

Land-grant small farm programs (pattern)

Reference work

  • Active
  • Free

Most states run a small-farm or beginning-farmer program inside their land-grant; ATTRA keeps the directory of them.

Find your state's version of Cornell Small Farms in one list.

Visit ↗

Checked Aug 30, 2026

Lebanon Turf

Distributor / manufacturer

  • Active
  • Paid
  • Ours

Nutrient and amendment maker. We hold structured data on 4 of their products: analysis, elements, pH effect, and dosing.

Run their actual products in our nutrient calculators before you buy a jug.

Visit ↗

Checked Aug 30, 2026

Ledgewood Farm greenhouse frames

Distributor / manufacturer

  • Active
  • Paid

Farmer-built pipe-frame high tunnels from New Hampshire, made since 1987 by a man who grows in them.

An economical tunnel and a phone call with the farmer who bends the pipe.

Visit ↗

Checked Aug 30, 2026

Link4 Controls

Distributor / manufacturer

  • Active
  • Paid

The Anaheim greenhouse controller maker: iGrow and Pearl cloud-connected controllers with text alerts. Not the SDSU iGrow, not iGrow News.

The mid-priced modern controller between Bartlett and Wadsworth.

Visit ↗

Checked Aug 30, 2026

LiteFarm

Software tool

  • Active
  • Free

Free farm planning and record software built with farmers by a university team, used on three thousand farms in over a hundred countries.

The easiest on-ramp to farm records for a small diversified operation.

Visit ↗

Checked Aug 30, 2026

LocalHarvest

Dataset

  • Active
  • Free

The longest-running national directory of small farms, CSAs, and markets, beloved for decades.

A free farm listing that customers actually find.

Visit ↗

Checked Aug 30, 2026

Make: Makerspace Directory

Maker space

  • Active
  • Free

One directory covering all three flavors of shared workshop: makerspaces, fab labs, and hackerspaces, with a map and state filters.

The widest what-is-near-me net, and the friendliest for a first-timer. Start here.

Visit ↗

Checked Aug 30, 2026

Maker Faire

Event

  • Active
  • Freemium

The global network of maker festivals, from school-gym mini faires to the Bay Area flagship, with a map of upcoming faires.

One weekend at a faire introduces you to every maker and space in your region.

Visit ↗

Checked Aug 30, 2026

Marbleseed

Organization

  • Active
  • Freemium
  • Link unresponsive at last check

Midwest organic education nonprofit, formerly MOSES, running the largest organic farming conference in the country plus an Organic Answer Line.

Fact sheets, New Farmer U, and the big La Crosse conference every winter.

Visit ↗

Checked Aug 30, 2026

Marbleseed Organic Farming Conference

Event

  • Active
  • Paid
  • Link unresponsive at last check

The largest organic farming conference in the country, late February in La Crosse, Wisconsin.

The organic movement's family reunion, workshops included.

Visit ↗

Checked Aug 30, 2026

Market Gardener Institute

Publication / media

  • Active
  • Freemium

Jean-Martin Fortier's channel and school: farm business case studies and greenhouse economics from the Market Gardener author.

The economics of small farming, taught by its most famous practitioner.

Visit ↗

Checked Aug 30, 2026

Mars Hydro

Distributor / manufacturer

  • Active
  • Paid
  • Ours

Grow light maker. We hold verified fixture specs for 2 of their lights: PPF, efficacy, power, coverage, with provenance.

Compare their real fixture numbers in our lighting tools before you spend.

Visit ↗

Checked Aug 30, 2026

Mid-Atlantic Fruit and Vegetable Convention

Event

  • Active
  • Paid

The Hershey, Pennsylvania winter convention, each late January, anchoring the mid-Atlantic grower calendar.

Three days of production sessions with the region's extension specialists in one hotel.

Visit ↗

Checked Aug 30, 2026

Midwest Vegetable Production Guide

Reference work

  • Active
  • Free

The annually updated multi-state commercial vegetable guide: what is labeled and recommended this year, crop by crop. Every region has an equivalent; this one and the Southeastern handbook are free online.

The current year's spray and variety book, free, updated every winter.

Visit ↗

Checked Aug 30, 2026

Modern Farmer

Publication / media

  • Active
  • Free

Food-and-farming features for a general audience, now owned by Epic Gardening rather than the old nonprofit foundation.

Readable farm storytelling; know it is a commercial magazine now.

Visit ↗

Checked Aug 30, 2026

Modus lab data standard

Standard

  • Active
  • Free

The standard terminology and formats for soil, manure, and tissue lab test data; version two shipped in 2025 and the open farm-tech world builds on it.

Soil tests that mean the same thing across labs and software.

Visit ↗

Checked Aug 30, 2026

Monnit

Distributor / manufacturer

  • Active
  • Paid

The Salt Lake wireless sensor manufacturer: affordable temperature, humidity, and water sensors with cloud alerting.

Commercial-grade sensors for barns and coolers when DIY is not the mood.

Visit ↗

Checked Aug 30, 2026

Monte Package Company

Distributor / manufacturer

  • Active
  • Paid

The family produce packaging house since 1925, in Michigan's fruit belt: clamshells, corrugated, and grab-and-go bags.

A century of packaging fruit, farm-market friendly.

Visit ↗

Checked Aug 30, 2026

MudPi

Software tool

  • Active
  • Free

A configurable smart-garden framework for Raspberry Pi and ESP32: sensors, relays, and automations from a YAML file.

Garden automation glue that reads like a config file, not a program.

Visit ↗

Checked Aug 30, 2026

Mycodo

Software tool

  • Active
  • Free

Raspberry Pi environmental monitoring and regulation with real PID control: greenhouse, mushroom, and hydroponic automation, relentlessly maintained for a decade.

Closed-loop climate control you own completely, on a fifty-dollar computer.

Visit ↗

Checked Aug 30, 2026

NASA FIRMS fire information

Data / API

  • Active
  • Free

Fire detection from satellites in near real time, free with a key.

Active-fire alerts for your area, from orbit.

Visit ↗

Checked Aug 30, 2026

NASA POWER

Data / API

  • Active
  • Free

NASA's agroclimatology data service: solar radiation, temperature, and humidity for any point on earth, with a clean REST API.

Solar data for greenhouse siting or panel sizing, anywhere, free.

Visit ↗

Checked Aug 30, 2026

Nation of Makers

Organization

  • Active
  • Free

The US nonprofit trade association for maker organizations, with a find-a-maker-organization tool and guides for starting a makerspace.

A US-focused door to maker organizations, and the people to call if your county wants a space of its own.

Visit ↗

Checked Aug 30, 2026

National Agricultural Library

Reference work

  • Active
  • Free

One of the largest agricultural libraries in the world, with free topic guides on CSA, specialty crops, and organic.

The nation's ag bookshelf, open to everyone.

Visit ↗

Checked Aug 30, 2026

National Farm Machinery Show

Event

  • Active
  • Free

The February Louisville machinery show, indoors, with the tractor pull.

The equipment winter pilgrimage east of the Mississippi.

Visit ↗

Checked Aug 30, 2026

National Farm to School Network

Organization

  • Active
  • Free

The network connecting local farms with school cafeterias, with procurement guides for both sides.

A steady institutional sales channel and the paperwork map to reach it.

Visit ↗

Checked Aug 30, 2026

National Farmers Union

Organization

  • Active
  • Freemium

The general farm organization advocating for family farms since 1902, with co-op education and a beginning farmer institute.

A policy voice for the family-scale farm and training to go with it.

Visit ↗

Checked Aug 30, 2026

National FFA Convention and Expo

Event

  • Active
  • Paid

The largest annual gathering of agricultural students in the country, each fall in Indianapolis.

Where the next generation of your industry shows up sixty thousand strong.

Visit ↗

Checked Aug 30, 2026

National Grange

Organization

  • Active
  • Paid

The oldest US agricultural fraternal organization, founded 1867, with halls in seventeen hundred towns.

A rural community institution that may already have a hall near you.

Visit ↗

Checked Aug 30, 2026

National Greenhouse Manufacturers Association

Organization

  • Active
  • Free

The trade association of greenhouse manufacturers: structural standards and buying guidance for greenhouse construction.

The standards your greenhouse frame should meet, from the people who build them.

Visit ↗

Checked Aug 30, 2026

National Plant Diagnostic Network

Organization

  • Active
  • Free

The lab network behind the land-grant plant clinics: a real diagnostic lab in every state.

Mail a sample, get a definitive disease identification, usually for a token fee.

Visit ↗

Checked Aug 30, 2026

National Urban Agriculture Initiative

University program

  • Active
  • Free

The Virginia State led USDA project equipping urban growers to actually use USDA services.

How to walk into an FSA or NRCS office as a city grower and come out with help.

Visit ↗

Checked Aug 30, 2026

National Weather Service API

Data / API

  • Active
  • Free

The National Weather Service's free forecast and alerts API, no key required.

Official forecasts and frost warnings wired straight into your own dashboard or automation.

Visit ↗

Checked Aug 30, 2026

National Young Farmers Coalition

Organization

  • Active
  • Freemium

The grassroots policy network for the next generation of farmers: land access advocacy, local chapters, and guides to credit and land.

The organized voice of beginning farmers, plus practical land and loan guides.

Visit ↗

Checked Aug 30, 2026

Native Seeds/SEARCH

Organization

  • Active
  • Freemium

Southwest-focused seed conservation: arid-adapted crop varieties and seed-saving education.

Crops that already know how to handle heat and drought.

Visit ↗

Checked Aug 30, 2026

NCERA-101 Controlled Environments Committee

University program

  • Active
  • Free

The multi-university committee on controlled environment technology: the measurement and reporting guidelines researchers themselves use.

How the scientists measure growth chambers, free to copy.

Visit ↗

Checked Aug 30, 2026

Nectar for the Gods

Distributor / manufacturer

  • Active
  • Paid
  • Ours

Nutrient and amendment maker. We hold structured data on 4 of their products: analysis, elements, pH effect, and dosing.

Run their actual products in our nutrient calculators before you buy a jug.

Visit ↗

Checked Aug 30, 2026

Netafim

Distributor / manufacturer

  • Active
  • Paid

The Israeli-born inventor of modern drip irrigation, now part of Orbia: the industry-standard driplines and emitters, sold through dealers.

The reference drip hardware; buy it through the retailers above.

Visit ↗

Checked Aug 30, 2026

NeverDry

Software tool

  • Active
  • Free

A new scientific water-balance irrigation integration for Home Assistant, releasing weekly since spring 2026.

The newest thinking in water-balance irrigation, free and moving fast.

Visit ↗

Checked Aug 30, 2026

Neversink Tools

Distributor / manufacturer

  • Active
  • Paid

Farmer-designed precision no-till tools, proven on one of the highest revenue-per-acre farms in the country, with a deep free video library.

Tools that earned their shape on a working farm, and the videos showing exactly how.

Visit ↗

Checked Aug 30, 2026

New England Vegetable and Fruit Conference

Event

  • Active
  • Paid

The biennial December conference at Manchester, New Hampshire, built by the region's extension services.

New England's every-other-year deep dive, extension-taught.

Visit ↗

Checked Aug 30, 2026

New England Vegetable Management Guide

Reference work

  • Active
  • Free

The multi-university commercial production guide for New England, fully online and kept current.

Crop-by-crop commercial recommendations for the Northeast, free.

Visit ↗

Checked Aug 30, 2026

NEWA

Software tool

  • Active
  • Free

The Network for Environment and Weather Applications: seven hundred on-farm stations across twenty states driving forty-plus disease and insect forecast tools.

Research-grade apple scab, fire blight, and late blight risk forecasts from a station near your farm, free.

Visit ↗

Checked Aug 30, 2026

Nifty Hoops

Distributor / manufacturer

  • Active
  • Paid

The Ann Arbor hoophouse maker known for community-build installations, a barn raising with your neighbors.

A gothic tunnel that goes up in a day with help, and the story to go with it.

Visit ↗

Checked Aug 30, 2026

No-Till Farmer

Publication / media

  • Active
  • Freemium

The no-till row-crop trade publication since 1972: equipment and agronomy for farming without the plow.

Fifty years of no-till practice, from the practitioners.

Visit ↗

Checked Aug 30, 2026

No-Till Growers

Publication / media

  • Active
  • Free

The best free technical video and podcast library in ecological market gardening, posting near daily, with real numbers from working farms.

Soil-first production methods taught relentlessly and free, by the most prolific serious educator on YouTube.

Visit ↗

Checked Aug 30, 2026

No-till on the Plains Winter Conference

Event

  • Active
  • Paid

The plains soil-health conference, each January in Kansas, teaching continuous no-till systems since the nineties.

The deepest bench of working no-till farmers in one room.

Visit ↗

Checked Aug 30, 2026

NOAA Climate Data Online

Data / API

  • Active
  • Free

Historical US station climate records: the archive behind thirty-year normals and frost-date history.

The real frost dates for your nearest station, not the folklore ones.

Visit ↗

Checked Aug 30, 2026

NOAA Storm Events Database

Dataset

  • Active
  • Free

The historical record of storms, hail, and severe weather by county.

Documentation for insurance and the honest history of what weather your county gets.

Visit ↗

Checked Aug 30, 2026

NOFA Summer Conference

Event

  • Active
  • Paid

The Northeast organic community's summer gathering, plus each state chapter's winter conference.

The Northeast's organic calendar anchor, twice a year counting your state chapter.

Visit ↗

Checked Aug 30, 2026

NOP National List

Reference work

  • Active
  • Free

The organic regulation's substance list itself: what is allowed, restricted, and prohibited, at the substance level rather than the brand level.

The ground truth under OMRI and every certifier's opinions.

Visit ↗

Checked Aug 30, 2026

North American Raspberry and Blackberry Association

Organization

  • Active
  • Paid

The membership organization for bramble growers: production guides and the caneberry grower network.

The people who know brambles, if berries are your row.

Visit ↗

Checked Aug 30, 2026

North American Strawberry Growers Association

Organization

  • Active
  • Paid

The strawberry grower association: research funding and production conferences.

The strawberry crowd and the research they fund.

Visit ↗

Checked Aug 30, 2026

Northeast Organic Farming Association

Organization

  • Active
  • Freemium

Seven state chapters of organic farmers and gardeners, going since 1971: workshops, certification help, and a summer conference.

Your state chapter is the local organic community in the Northeast.

Visit ↗

Checked Aug 30, 2026

NPIC (National Pesticide Information Center)

Organization

  • Active
  • Free

Objective pesticide science from Oregon State and EPA: fact sheets on nearly every active ingredient, and a live hotline, 1-800-858-7378, with a human who does this all day.

Someone qualified to call about an exposure, a label term, or whether something is safe around the dog. Almost nobody knows this exists.

Visit ↗

Checked Aug 30, 2026

NPIRS state pesticide registration

Dataset

  • Active
  • Free

One search across most states' pesticide registration data. Federal registration is not enough; the product must be registered in your state too.

Answer 'is this registered in MY state' without hunting through fifty ag department sites.

Visit ↗

Checked Aug 30, 2026

NRCS Soil Data Access

Data / API

  • Active
  • Free

Direct query access to the national soils database: SQL over REST.

Soil properties for any field polygon, programmatically.

Visit ↗

Checked Aug 30, 2026

NYSPAD (New York pesticide database)

Dataset

  • Active
  • Free

New York's pesticide administration database, with the state-approved label PDFs. New York often lags or restricts beyond the federal label.

New York growers confirm registration and download the New York specific label.

Visit ↗

Checked Aug 30, 2026

OAT Sketches (open firmware)

Software tool

  • Active
  • Free
  • Ours

Free, open firmware for cheap sensors: flash an ESP32 from the browser and it reads probes and reports to a place you own. Source is public on GitHub.

The build-one-tonight software, tested on the bench and in the field.

Visit ↗

Checked Aug 30, 2026

Offrange

Publication / media

  • Active
  • Free

Excellent original reporting on farm economics from the Ambrook team; formerly named Ambrook Research.

Sharp, free journalism about the business you are actually in.

Visit ↗

Checked Aug 30, 2026

OGC SensorThings API

Standard

  • Active
  • Free

The open, royalty-free standard for publishing sensor observations over REST and MQTT, with open-source servers available.

The grown-up open way to publish a weather station or soil sensor feed.

Visit ↗

Checked Aug 30, 2026

Ohio Earth Food

Distributor / manufacturer

  • Active
  • Paid

One of the original organic input suppliers in the country, since 1972: Re-Vita fertilizers, humates, and micronutrients direct to growers.

Organic inputs from people who sold them before organic was a market.

Visit ↗

Checked Aug 30, 2026

Ohio State OHCEAC

University program

  • Active
  • Free

Ohio State's Controlled Environment Agriculture Center: research, hydroponics workshops, and disease management resources.

Midwest CEA research and workshops with a practical bent.

Visit ↗

Checked Aug 30, 2026

OMRI Products List

Dataset

  • Active
  • Free

The independent nonprofit review of input products against organic standards, searchable free. Note it is a paid review service for makers: absence from the list does not mean prohibited.

The default 'can I use this and keep my certification' check.

Visit ↗

Checked Aug 30, 2026

Onset (HOBO)

Distributor / manufacturer

  • Active
  • Paid
  • Link unresponsive at last check

The Massachusetts data logger maker: HOBO loggers for soil temperature, humidity, and light, research-grade records cheap.

The logger university extension tells you to buy for a trial.

Visit ↗

Checked Aug 30, 2026

Open Food Network

Software tool

  • Active
  • Freemium

Open-source online marketplace software run by a global federation of nonprofits: twenty-five hundred farms and food hubs selling direct in fifteen countries.

Sell online without platform lock-in or a percentage skimmed by a landlord you cannot leave.

Visit ↗

Checked Aug 30, 2026

Open Soil Spectral Library

Dataset

  • Active
  • Free

A global open database of soil spectra with a free prediction engine: upload a scan, get soil property estimates.

The open-science path to cheap soil analysis as DIY spectrometers mature.

Visit ↗

Checked Aug 30, 2026

Open Source Seed Initiative

Organization

  • Active
  • Free

Copyleft for seeds: a pledge that keeps varieties free to save, replant, and breed from, forever.

Varieties no patent can ever take away from you.

Visit ↗

Checked Aug 30, 2026

Open Textbook Library agriculture shelf

Reference work

  • Active
  • Free

Peer-reviewed open college textbooks, free to read and reuse; browse to the agriculture subject shelf.

College-level plant and soil science without the bookstore bill.

Visit ↗

Checked Aug 30, 2026

Open-Meteo

Data / API

  • Active
  • Free

An open-source weather API blending fifteen-plus national models, no key required, with soil temperature, soil moisture, and reference evapotranspiration among its variables.

The easiest forecast feed for an ESP32 or Home Assistant dashboard; there is already an HA integration.

Visit ↗

Checked Aug 30, 2026

OpenET

Data / API

  • Active
  • Free

Satellite-measured evapotranspiration at field scale across forty-eight states, with the FARMS tool for individual farmers and a REST API.

See how much water your fields actually consumed, monthly, free. This was thousands of dollars a field a decade ago.

Visit ↗

Checked Aug 30, 2026

OpenSourceAgriculture index and newsletter

Reference work

  • Active
  • Free

The actively curated index of open ag datasets, models, and hardware, from the OpenWeedLocator author, with a companion newsletter.

The research side of open ag, kept current by someone who ships hardware himself.

Visit ↗

Checked Aug 30, 2026

OpenSprinkler

Hardware

  • Active
  • Paid

The proven open irrigation controller: buy the hardware or build it, firmware and weather logic all open and still releasing.

Irrigation control with weather smarts that answers to you, not a cloud subscription.

Visit ↗

Checked Aug 30, 2026

OpenTEAM

Community

  • Active
  • Free

The farmer-driven open technology ecosystem: interoperable open tools for farm records, soil health, and decision support.

The community wiring open farm tools together so your data enters once and works everywhere.

Visit ↗

Checked Aug 30, 2026

OpenValve

Hardware

  • Active
  • Free

A 3D-printable irrigation pinch valve, the fastest-growing new open farm hardware project of the past year.

Print your own valves at the makerspace instead of buying them by the dozen.

Visit ↗

Checked Aug 30, 2026

OpenWeedLocator

Hardware

  • Active
  • Free

A camera-and-Raspberry-Pi weed detector for spot spraying, peer-reviewed and buildable for a few hundred dollars, with excellent documentation.

The gentlest on-ramp to practical machine vision on a farm.

Visit ↗

Checked Aug 30, 2026

Organic Farming Research Foundation

Organization

  • Active
  • Free

A nonprofit that funds organic farming research and translates it into free grower guides and webinars.

Research-based organic answers without reading the journals yourself.

Visit ↗

Checked Aug 30, 2026

Organic Grower Summit

Event

  • Active
  • Paid

The organic production and supply-chain summit, late fall in Monterey, California.

Where commercial organic growers meet their buyers and suppliers.

Visit ↗

Checked Aug 30, 2026

Organic Seed Alliance

Organization

  • Active
  • Free

The nonprofit for organic seed systems: free seed-production manuals and on-farm participatory breeding training.

How to grow your own seed crop properly, taught free.

Visit ↗

Checked Aug 30, 2026

Organic Trade Association

Organization

  • Active
  • Freemium

The trade association for the organic industry: market data and regulatory tracking.

Where the organic market numbers and rule changes get reported first.

Visit ↗

Checked Aug 30, 2026

Osborne Quality Seeds

Distributor / manufacturer

  • Active
  • Paid

The professional vegetable seed supplier in Washington: pelleted, organic, and precision amounts with small-farm-friendly minimums.

Pro-grade seed service without pro-grade minimums.

Visit ↗

Checked Aug 30, 2026

OSU Organic Fertilizer and Cover Crop Calculator

Software tool

  • Active
  • Free

Oregon State's calculator predicting plant-available nitrogen from organic amendments and comparing cost per pound.

Turn a soil test and a pallet of options into an application plan with honest math.

Visit ↗

Checked Aug 30, 2026

Paperpot Co

Distributor / manufacturer

  • Active
  • Paid

The importer of the paperpot transplanting system and Jang seeders, run by the Farm Small Farm Smart podcast's Diego Footer.

Transplant a bed in minutes, and hundreds of hours of free small-farm business education from the same house.

Visit ↗

Checked Aug 30, 2026

PASA Sustainable Agriculture Conference

Event

  • Active
  • Paid

Pennsylvania's big February sustainable-farming conference, one of the strongest education programs in the East.

A winter's worth of learning in a long weekend.

Visit ↗

Checked Aug 30, 2026

PERC (Pesticide Educational Resources Collaborative)

Reference work

  • Active
  • Free

The official free Worker Protection Standard training library: EPA-approved videos and manuals, English and Spanish.

The compliance training people pay consultants for, sitting free, if you have even one non-family employee.

Visit ↗

Checked Aug 30, 2026

Pesticide Environmental Stewardship

Reference work

  • Active
  • Free

The multi-university site on drift, sprayer calibration, storage, and disposal.

Teach yourself calibration and drift management the right way, free.

Visit ↗

Checked Aug 30, 2026

Pesticide Properties DataBase

Dataset

  • Active
  • Free

Free academic data on eighteen hundred active ingredients: environmental fate, bee toxicity, leaching potential. The numbers behind the label warnings. European regulatory fields differ from US status.

Compare two actives on bee toxicity or groundwater risk before choosing. Virtually unknown outside academia.

Visit ↗

Checked Aug 30, 2026

Plant Marvel Laboratories

Distributor / manufacturer

  • Active
  • Paid
  • Ours

Nutrient and amendment maker. We hold structured data on 6 of their products: analysis, elements, pH effect, and dosing.

Run their actual products in our nutrient calculators before you buy a jug.

Visit ↗

Checked Aug 30, 2026

PlantCV

Software tool

  • Active
  • Free

Ten years of open plant-phenotyping image analysis in Python, with version four lowering the bar for non-coders.

Measure plants from photographs the way the research stations do.

Visit ↗

Checked Aug 30, 2026

Plants For A Future

Dataset

  • Active
  • Free

A database of seven thousand edible and useful plants with cultivation details.

Research the uncommon perennial and permaculture crops nobody else documents.

Visit ↗

Checked Aug 30, 2026

PlantVillage

Software tool

  • Active
  • Free

AI plant disease diagnosis, trained on more than fifty thousand images, that runs on a phone even offline.

Photograph a sick leaf and get a diagnosis on the spot.

Visit ↗

Checked Aug 30, 2026

Pollinator Partnership

Organization

  • Active
  • Free

The largest pollinator-conservation nonprofit, with free planting guides matched to your ecoregion by zip code.

Type your zip, get the exact planting guide for your ecological region, free.

Visit ↗

Checked Aug 30, 2026

Practical Farmers of Iowa

Community

  • Active
  • Freemium

The gold standard of farmer-led research: members run replicated trials on their own farms and publish the results, hundreds of them, free.

Real on-farm trial data on cover crops, small grains, and horticulture, from farmers rather than salesmen.

Visit ↗

Checked Aug 30, 2026

Premier Tech (PRO-MIX)

Distributor / manufacturer

  • Active
  • Paid

The family-controlled Quebec company behind PRO-MIX, the default professional peat mixes, whose free Training Center articles are genuinely good agronomy.

The standard mixes, and free schooling on media, fertility, and root disease.

Visit ↗

Checked Aug 30, 2026

PRISM Climate Group

Dataset

  • Active
  • Free

Gridded US climate normals and dailies at eight hundred meter resolution.

The true thirty-year precipitation and temperature normals for your exact parcel.

Visit ↗

Checked Aug 30, 2026

Produce Safety Alliance

University program

  • Active
  • Freemium

The Cornell-led national training collaborative for the FSMA Produce Safety Rule; its grower training is the standard course.

The class that satisfies the federal training requirement, plus free fact sheets.

Visit ↗

Checked Aug 30, 2026

Produce Traceability Initiative

Standard

  • Active
  • Free

The produce industry's case-level traceability labeling standard, with practical guidance for the federal traceability rule.

The must-know before scaling into wholesale produce.

Visit ↗

Checked Aug 30, 2026

Progressive Farmer / DTN

Publication / media

  • Active
  • Freemium

The largest-circulation US farm magazine, riding on DTN's market and weather data spine.

Row-crop news with real market data underneath.

Visit ↗

Checked Aug 30, 2026

Prospiant

Distributor / manufacturer

  • Active
  • Paid

The 2021 merger of Rough Brothers, Nexus, and ThermoEnergy: engineered commercial greenhouses. The old names no longer exist as brands.

Gutter-connect engineering when a grower graduates to real commercial glass.

Visit ↗

Checked Aug 30, 2026

PubChem

Data / API

  • Active
  • Free

NIH's giant open chemistry database: toxicity, hazard classifications, and literature for any chemical, pesticide actives included, with a full REST API.

The deep dive on one chemical when you want the primary numbers.

Visit ↗

Checked Aug 30, 2026

Quivira Coalition New Agrarian Program

Organization

  • Active
  • Free

Regenerative ranching nonprofit running paid eight-month apprenticeships on working Western ranches.

A paid path into regenerative ranching, boots on real ground.

Visit ↗

Checked Aug 30, 2026

Rain-Flo Irrigation

Distributor / manufacturer

  • Active
  • Paid

The Lancaster County manufacturer and dealer: drip supplies plus the vegetable plasticulture iron, mulch layers and water-wheel transplanters, at Plain-community prices.

The plasticulture standard for market growers, built where practicality is a virtue.

Visit ↗

Checked Aug 30, 2026

REAP energy grants

Funding program

  • Active
  • Free
  • Link unresponsive at last check

The Rural Energy for America Program funds renewable energy and efficiency: solar, better greenhouse glazing, efficient equipment.

Federal help paying for the solar array or the efficient upgrade you were pricing anyway.

Visit ↗

Checked Aug 30, 2026

RED Gardens

Publication / media

  • Active
  • Free

Systematic comparative growing trials, quantified and honestly reported: the most genuinely data-driven grower-educator on YouTube.

What happens when someone actually measures their garden methods for a decade.

Visit ↗

Checked Aug 30, 2026

REGENERATE Conference

Event

  • Active
  • Paid

The Southwest's regenerative ranching and agriculture conference, each fall, hosted by the Quivira Coalition and partners.

The working-lands regenerative community, ranchers included.

Visit ↗

Checked Aug 30, 2026

Regenerative Organic Alliance

Organization

  • Active
  • Paid

The nonprofit behind the Regenerative Organic Certified label, a rung above USDA Organic covering soil, animals, and workers.

A certification ladder beyond organic, if your market rewards it.

Visit ↗

Checked Aug 30, 2026

Regional IPM Centers

University program

  • Active
  • Free

Four USDA regional centers with crop profiles and pest management strategic plans tuned to each region.

The IPM playbook for your crop in your region, not a national average.

Visit ↗

Checked Aug 30, 2026

Repair Café

Community

  • Active
  • Free

A worldwide network of free volunteer repair events, thousands of them, with a locator. Bring the broken thing; leave with it working and knowing why.

Free hands and multimeters for a dead controller or a balky pump, and the repair folks know every other workshop in town.

Visit ↗

Checked Aug 30, 2026

Resource Innovation Institute

Organization

  • Active
  • Free

The nonprofit benchmarking energy and water efficiency in controlled environment agriculture: free best-practice guides on lighting, HVAC, and water plus PowerScore benchmarking.

Free engineering-grade guides to cut your grow's power and water bills.

Visit ↗

Checked Aug 30, 2026

Rimol Greenhouse Systems

Distributor / manufacturer

  • Active
  • Paid

The family New Hampshire greenhouse and high-tunnel manufacturer: snow-rated Nor'Easter tunnels engineered for hard winters.

The tunnel that holds when the snow comes; the Northern standard for cost-shared tunnels.

Visit ↗

Checked Aug 30, 2026

Rivulis

Distributor / manufacturer

  • Active
  • Paid

The global drip manufacturer behind T-Tape, the tape most market growers actually run; absorbed Jain's international irrigation business in 2023.

T-Tape by any other dealer; there is no separate Jain USA to look for anymore.

Visit ↗

Checked Aug 30, 2026

Rodale Institute

Organization

  • Active
  • Free

The pioneer organic research farm, running since 1947, home of the long-running Farming Systems Trial comparing organic and conventional side by side.

Free consulting for organic transition and research-backed practice guides from the people who started it all.

Visit ↗

Checked Aug 30, 2026

Rogue Farm Corps

Organization

  • Active
  • Paid

Structured season-long farm internships and apprenticeships on Oregon host farms; the model program others copy.

Immersive training with a curriculum, not just a summer of weeding.

Visit ↗

Checked Aug 30, 2026

Roots Organics

Distributor / manufacturer

  • Active
  • Paid
  • Ours

Nutrient and amendment maker. We hold structured data on 3 of their products: analysis, elements, pH effect, and dosing.

Run their actual products in our nutrient calculators before you buy a jug.

Visit ↗

Checked Aug 30, 2026

SARE farmer grants

Funding program

  • Active
  • Free

The grants a farmer can apply for directly: ten to thirty thousand dollars to run a real experiment on your own operation, through your SARE region.

Paid to answer your own question, and your results join the public library.

Visit ↗

Checked Aug 30, 2026

SAREF4AGRI

Standard

  • Active
  • Free

The European standards body's free ontology for smart agriculture sensors: soil moisture, irrigation, livestock, formally described.

A free formal vocabulary for exactly the sensors we teach.

Visit ↗

Checked Aug 30, 2026

Savory Institute

Organization

  • Active
  • Paid

The holistic-management grazing network, with more than thirty training hubs worldwide.

Grazing-planning training through a regional hub if you run animals on grass.

Visit ↗

Checked Aug 30, 2026

Seed Savers Exchange

Organization

  • Active
  • Freemium

The largest US nonprofit seed bank, twenty-seven thousand heirloom varieties in Decorah, Iowa, with a member-to-member exchange.

Heirlooms you cannot buy anywhere, and the community keeping them alive.

Visit ↗

Checked Aug 30, 2026

SeedLinked

Software tool

  • Active
  • Freemium

A crowdsourced variety-trial platform: ratings from dozens of real farms per variety.

How a variety actually performed across farms in your climate.

Visit ↗

Checked Aug 30, 2026

Seedway

Distributor / manufacturer

  • Active
  • Paid

The commercial vegetable seed division of the GROWMARK co-op, with regional reps across the East.

Where market growers graduate for volume onion, sweet corn, and vine-crop seed.

Visit ↗

Checked Aug 30, 2026

Senninger

Distributor / manufacturer

  • Active
  • Paid
  • Link unresponsive at last check

The Florida sprinkler maker, now a Hunter company, whose Wobblers are beloved for germination and frost protection.

The overhead sprinkler the seed-starting crowd swears by.

Visit ↗

Checked Aug 30, 2026

Sensaphone

Distributor / manufacturer

  • Active
  • Paid

The forty-year-old remote monitoring and alarm maker: the classic greenhouse freeze and power-failure phone alarm.

The device generations of growers bought after their first frozen house.

Visit ↗

Checked Aug 30, 2026

Seven Springs Farm Supply

Distributor / manufacturer

  • Active
  • Paid

The Virginia organic farming supply house since 1990: organic fertilizers, cover crop seed, and row cover, shipped nationally with real advice.

The organic mail-order the mid-Atlantic leans on, with a human who farms.

Visit ↗

Checked Aug 30, 2026

SIP (Sustainable Irrigation Platform)

Software tool

  • Active
  • Free

A long-lived Python irrigation controller for the Raspberry Pi, plugin-extensible and still actively maintained.

Roll-your-own irrigation scheduling with a decade of community plugins.

Visit ↗

Checked Aug 30, 2026

Slow Food USA

Organization

  • Active
  • Freemium

The US arm of the good, clean, fair food movement: the Ark of Taste heritage varieties and local chapters.

Customers who care, and the heritage-variety honor roll.

Visit ↗

Checked Aug 30, 2026

Smart Home Junkie

Publication / media

  • Active
  • Free

Current, competent Home Assistant tutorials whose 2026 garden-watering guide took the top search slot in weeks.

The freshest HA irrigation walkthroughs going.

Visit ↗

Checked Aug 30, 2026

Smart Irrigation for Home Assistant

Software tool

  • Active
  • Free

Evapotranspiration-based watering duration for Home Assistant: it does the FAO-56 math against real weather so you water what the plants actually used.

Irrigation that follows the weather instead of the calendar, free, in the platform you already run.

Visit ↗

Checked Aug 30, 2026

Soil Health Institute

Organization

  • Active
  • Free

A scientific nonprofit working out which soil health measurements actually matter and what they are worth in dollars.

Guidance on which soil health indicators are worth paying a lab to test.

Visit ↗

Checked Aug 30, 2026

SoilGrids

Data / API

  • Active
  • Free

Global machine-learning soil property maps at two hundred fifty meters, with a REST API.

Soil estimates for anywhere on earth the US survey does not reach.

Visit ↗

Checked Aug 30, 2026

SoilWeb

Software tool

  • Active
  • Free

The soil survey on a map: tap anywhere and see the full soil profile, on the web or the phone app.

Stand in a field and see the mapped soil under your boots, in real time.

Visit ↗

Checked Aug 30, 2026

Southeast Regional Fruit and Vegetable Conference

Event

  • Active
  • Paid

The Southeast's big specialty-crop meeting, each January in Savannah.

The winter meeting for southeastern fruit and vegetable growers.

Visit ↗

Checked Aug 30, 2026

Southeastern US Vegetable Crop Handbook

Reference work

  • Active
  • Free

The Southeast's annually updated commercial vegetable production bible, free as a full PDF.

The current-year production book for the South, free.

Visit ↗

Checked Aug 30, 2026

Southern Exposure Seed Exchange

Distributor / manufacturer

  • Active
  • Paid

The worker-run Virginia co-op: heat-adapted, Southeast-proven varieties and seed-saving know-how.

Seed that already knows Southern summers.

Visit ↗

Checked Aug 30, 2026

Southern SAWG Conference

Event

  • Active
  • Paid

The South's sustainable agriculture conference, each January, with one of the strongest practical-workshop slates anywhere.

Southern growers teaching southern growers, in January when you can leave the farm.

Visit ↗

Checked Aug 30, 2026

Specialty Crop Block Grants

Funding program

  • Active
  • Free

Federal money that flows through each state's department of agriculture specifically for fruit, vegetable, and specialty crop projects.

Your state ag department's pot for specialty crops; watch their annual call.

Visit ↗

Checked Aug 30, 2026

Spectrum Technologies

Distributor / manufacturer

  • Active
  • Paid

The Illinois ag measurement maker: WatchDog weather stations, soil moisture meters, and chlorophyll meters pitched at growers, not labs.

Field-scouting instruments with a knowledge base that teaches their use.

Visit ↗

Checked Aug 30, 2026

Spider Farmer

Distributor / manufacturer

  • Active
  • Paid
  • Ours

Grow light maker. We hold verified fixture specs for 2 of their lights: PPF, efficacy, power, coverage, with provenance.

Compare their real fixture numbers in our lighting tools before you spend.

Visit ↗

Checked Aug 30, 2026

State agricultural mesonets

Dataset

  • Active
  • Free

Many states run agricultural weather networks: Oklahoma's Mesonet is the gold standard, with AgWeatherNet in Washington, FAWN in Florida, CIMIS in California, and AgriMet in the Northwest.

Hourly soil moisture, ET, and frost data from real stations in your state, usually free.

Visit ↗

Checked Aug 30, 2026

State Pesticide Safety Education Programs

University program

  • Active
  • Freemium

Every land-grant runs a pesticide safety education program: applicator training, study manuals, exam prep, recertification credits. Cornell's is the linked example; find yours through your state extension.

The path to a private applicator license if you ever need restricted-use products.

Visit ↗

Checked Aug 30, 2026

Stokes Seeds

Distributor / manufacturer

  • Active
  • Paid

The commercial vegetable seed house serving the Great Lakes and Northeast with a strong rep network.

The other pro seed house neighbors mention alongside Seedway.

Visit ↗

Checked Aug 30, 2026

Stuppy Greenhouse

Distributor / manufacturer

  • Active
  • Paid

The Kansas City greenhouse manufacturer with roots to 1873: commercial structures and hydronic heat for serious year-round production.

The step up when your operation outgrows kit tunnels.

Visit ↗

Checked Aug 30, 2026

Successful Farming

Publication / media

  • Active
  • Free

The flagship general farm magazine, free online.

Mainstream row-crop coverage and machinery talk.

Visit ↗

Checked Aug 30, 2026

Sun Gro Horticulture

Distributor / manufacturer

  • Active
  • Paid

The largest North American peat and mix producer: Sunshine and Black Gold, at every distributor.

The other default mix, wherever you already shop.

Visit ↗

Checked Aug 30, 2026

Sun System

Distributor / manufacturer

  • Active
  • Paid
  • Ours

Grow light maker. We hold verified fixture specs for 1 of their lights: PPF, efficacy, power, coverage, with provenance.

Compare their real fixture numbers in our lighting tools before you spend.

Visit ↗

Checked Aug 30, 2026

Sunbelt Ag Expo

Event

  • Active
  • Paid

The Southeast's October field show at Moultrie, Georgia, with harvest demonstrations on a working research farm.

The South's farm show, machinery running in the dirt.

Visit ↗

Checked Aug 30, 2026

SurveyStack and Our-Sci

Software tool

  • Active
  • Freemium

The open data-collection platform behind OpenTEAM and the Bionutrient Institute, with hooks for hand-held instruments and the Modus soil standard.

Community-owned research plumbing when your farm joins a study.

Visit ↗

Checked Aug 30, 2026

Suståne Natural Fertilizer

Distributor / manufacturer

  • Active
  • Paid
  • Ours

Nutrient and amendment maker. We hold structured data on 7 of their products: analysis, elements, pH effect, and dosing. 5 are OMRI listed.

Run their actual products in our nutrient calculators before you buy a jug.

Visit ↗

Checked Aug 30, 2026

Synoptic Data

Data / API

  • Active
  • Freemium

An aggregator API over a hundred thousand US weather stations, including many mesonets.

One API call to the nearest station of any network.

Visit ↗

Checked Aug 30, 2026

Territorial Seed

Distributor / manufacturer

  • Active
  • Paid

The family Oregon seed house whose trial-farm heritage shows in the catalog notes, tuned for year-round West Coast growing.

Varieties proven where winters are wet and summers are dry.

Visit ↗

Checked Aug 30, 2026

TFI and 4R Nutrient Stewardship

Organization

  • Active
  • Free
  • Link unresponsive at last check

The fertilizer industry's stewardship framework: right source, rate, time, place. The framework is sound agronomy that extension endorses; the sponsor is the industry's advocate. Both things are true.

A memorable frame for nutrient decisions, provenance understood.

Visit ↗

Checked Aug 30, 2026

The Calculators (134 free tools)

Software tool

  • Active
  • Free
  • Ours

134 free calculators built by the collective: VPD, nutrients, lighting, structures, livestock, bees, and more. Every one runs in the browser and can be embedded on your own site.

Run the numbers on nearly any growing question without a spreadsheet or a subscription.

Visit ↗

Checked Aug 30, 2026

The Land Institute

Organization

  • Active
  • Free

The research nonprofit breeding perennial grain crops, including Kernza, toward agriculture that does not need replanting every year.

A window into the perennial future of grain, with field days and publications.

Visit ↗

Checked Aug 30, 2026

The Livestock Conservancy

Organization

  • Active
  • Freemium

The heritage-breed conservation nonprofit since 1977: the Conservation Priority List, breed selection guides, and a breeder directory.

Which rare breed fits your farm, and who will sell you starting stock.

Visit ↗

Checked Aug 30, 2026

The OAT Ag Atlas

Dataset

  • Active
  • Free
  • Ours

A national directory of the places of American agriculture: farmers markets, agritourism, CSAs, food hubs, on-farm markets, processors, with county profiles built on the USDA census.

Find the ag places near you, or claim your own listing and control how it shows.

Visit ↗

Checked Aug 30, 2026

The oat-ods data schema

Standard

  • Active
  • Free
  • Ours

An open data schema for grower observations, so readings mean the same thing across tools. Published with a developer reference and compatibility notes.

A common shape for your data that no vendor can take away.

Visit ↗

Checked Aug 30, 2026

The Packer

Publication / media

  • Active
  • Freemium

The fresh produce supply chain's daily read, whose Fresh Trends survey and Produce Market Guide are reference works in their own right.

What buyers and retailers are thinking, and real consumer demand data by commodity.

Visit ↗

Checked Aug 30, 2026

THRIVE Top 50

Reference work

  • Active
  • Free

The annual ranking of the fifty most innovative growth-stage agtech and foodtech startups, published each January.

A yearly scan of what the money thinks is next.

Visit ↗

Checked Aug 30, 2026

Tilmor

Distributor / manufacturer

  • Active
  • Paid

Ohio-built cultivating tractors, including a new electric, plus basket weeders and wheel hoes, priced for real small farms.

The cultivation iron that fills the gap the old Allis-G left behind.

Visit ↗

Checked Aug 30, 2026

Tool Library Alliance

Community

  • Active
  • Free

The US network of tool lending libraries, with a member map. Borrow tools the way you borrow books.

Borrow the four-hundred-dollar tool you need twice a year instead of buying it.

Visit ↗

Checked Aug 30, 2026

True Leaf Market

Distributor / manufacturer

  • Active
  • Paid

The Salt Lake seed retailer that absorbed the 1917 Kitazawa line: Asian vegetable varieties plus microgreens and cover crop seed by the pound.

The Kitazawa Asian-vegetable heritage lives here now, not at the old name.

Visit ↗

Checked Aug 30, 2026

Tunnel Vision Hoops

Distributor / manufacturer

  • Active
  • Paid

Cleveland-made DIY high-tunnel kits, fourteen to thirty feet wide, custom sizes for odd lots, with real technical support.

American-made kits sized to your actual space, urban lots included.

Visit ↗

Checked Aug 30, 2026

UC IPM

Reference work

  • Active
  • Free

The most complete free integrated pest management encyclopedia: identification, thresholds, and management by crop, plus degree-day tools and bee precaution ratings.

Look up any pest and get research-backed thresholds and least-toxic controls first.

Visit ↗

Checked Aug 30, 2026

UC IPM Bee Precaution Ratings

Dataset

  • Active
  • Free

Expert-reviewed ratings of active-ingredient toxicity to honey bees, adult and brood, often stricter than the label language.

Among the legal options, pick the one least hazardous to your bees, and time it right.

Visit ↗

Checked Aug 30, 2026

UF/IFAS greenhouse and hydroponics resources

University program

  • Active
  • Free

Florida's small farms program: hot-climate protected culture and hydroponics resources from the state that grows through summer.

Greenhouse answers tuned for heat, not just northern winters.

Visit ↗

Checked Aug 30, 2026

Upstream Ag Insights

Publication / media

  • Active
  • Freemium

The weekly analysis newsletter on agribusiness and agtech strategy, free tier plus paid depth.

How the input and tech companies actually think, decoded weekly.

Visit ↗

Checked Aug 30, 2026

Urban Ag News

Publication / media

  • Active
  • Free

The free trade publication covering urban agriculture and CEA in plain language, with serious greenhouse agronomy behind it.

Readable CEA education from people who have grown commercially.

Visit ↗

Checked Aug 30, 2026

Urban Growers Collective

Organization

  • Active
  • Free

The Chicago urban-farm nonprofit whose farmer-training program is a national model for urban food production.

The blueprint for serious urban farming, proven on fourteen acres of Chicago.

Visit ↗

Checked Aug 30, 2026

US Composting Council STA program

Organization

  • Active
  • Free
  • Link unresponsive at last check

The Seal of Testing Assurance: participating compost producers test to standard methods and publish a technical data sheet. Producer-disclosed testing, not government certification.

Buy compost with actual lab numbers. Ask any supplier for their data sheet; the good ones have it.

Visit ↗

Checked Aug 30, 2026

US Men's Sheds Association

Community

  • Active
  • Free

A workshop and social club where members gather to build things, with a zip-code shed locator. Born in Australia, growing here.

Woodshop access plus retired machinists and electricians who are happy to teach. The person who shows you an ESP32 is not a scary thing may be here.

Visit ↗

Checked Aug 30, 2026

USA National Phenology Network

Data / API

  • Active
  • Free

Daily gridded accumulated growing degree day maps and pest emergence forecasts, plus the Nature's Notebook citizen science program.

National degree-day maps and pheno-forecasts you can pull by point through their geoserver.

Visit ↗

Checked Aug 30, 2026

USDA Ag Data Commons

Dataset

  • Active
  • Free

USDA's public repository of research datasets: the raw data behind the papers, from trials to soils to genomics.

Pull the actual datasets behind USDA research instead of just reading summaries.

Visit ↗

Checked Aug 30, 2026

USDA Agricultural Research Service

Organization

  • Active
  • Free

USDA's in-house research agency, ninety-plus locations, public research on every crop, home of the National Agricultural Library.

The research your taxes already paid for, on whatever you grow.

Visit ↗

Checked Aug 30, 2026

USDA AMS Market News

Data / API

  • Active
  • Free

Daily wholesale and terminal-market price reports for produce, livestock, and grain, with a free API.

What your crop actually sold for at the nearest terminal market, so you never price blind.

Visit ↗

Checked Aug 30, 2026

USDA CropScape and the Cropland Data Layer

Dataset

  • Active
  • Free

The annual satellite-derived crop map of the entire country, now at ten meter resolution, going back more than fifteen years.

See what every field around you grew for the last fifteen years. Rotation intel nobody realizes is public.

Visit ↗

Checked Aug 30, 2026

USDA ERS Data Products

Dataset

  • Active
  • Free

The Economic Research Service's datasets: costs of production, the food dollar, and market outlooks.

Benchmark your enterprise budget against national cost-of-production data.

Visit ↗

Checked Aug 30, 2026

USDA Local Food Portal

Dataset

  • Active
  • Free

USDA's directories of farmers markets, CSAs, food hubs, and on-farm markets, with an API. The same well our Ag Atlas draws from.

List your operation where the government looks, and find every market within driving distance.

Visit ↗

Checked Aug 30, 2026

USDA NASS Quick Stats

Data / API

  • Active
  • Free

The most comprehensive US agricultural statistics database: every crop, county, and year, including the Census of Agriculture, with a free keyed API.

County-level yields, acreage, and prices to benchmark your own operation against.

Visit ↗

Checked Aug 30, 2026

USDA Organic INTEGRITY Database

Dataset

  • Active
  • Free

The registry of every certified organic operation and certifier worldwide, with an API and full downloads.

Verify a supplier's organic certificate is real and current, or find a certifier.

Visit ↗

Checked Aug 30, 2026

USDA PLANTS Database

Dataset

  • Active
  • Free

The authoritative US plant database: taxonomy, distribution by county, and characteristics.

Verify any plant's identity, native status, and range.

Visit ↗

Checked Aug 30, 2026

USDA SARE

Funding program

  • Active
  • Free

Sustainable Agriculture Research and Education: USDA's grant program with four regional offices, farmer and rancher grants you can apply for directly, and a free book library that includes the standard texts.

Ten to thirty thousand dollars to try something on your own farm, and free full books like Building Soils for Better Crops.

Visit ↗

Checked Aug 30, 2026

USDA Urban Agriculture (OUAIP)

Funding program

  • Active
  • Free

USDA's Office of Urban Agriculture and Innovative Production: urban ag grants, county-office navigation, and composting programs.

The federal front door for city growing, with money behind it.

Visit ↗

Checked Aug 30, 2026

USGS EarthExplorer

Dataset

  • Active
  • Free

The full Landsat archive, more than fifty years of it, free to download.

Decades of imagery of your land, for documenting long-term change.

Visit ↗

Checked Aug 30, 2026

uspest.org degree-day models

Software tool

  • Active
  • Free

A hundred and fifty degree-day pest and plant models runnable against twenty thousand US stations, with maps.

When does this pest hatch at MY place, answered for the whole country.

Visit ↗

Checked Aug 30, 2026

Utah State crop physiology lab (Bugbee)

University program

  • Active
  • Free

Bruce Bugbee's lab: the plain-spoken science of light, photosynthesis, and controlled environments, generously published.

The lighting science behind every LED claim, from the source everyone cites.

Visit ↗

Checked Aug 30, 2026

Vegetable Growers News

Publication / media

  • Active
  • Free

Monthly for commercial vegetable growers with strong farm-market coverage; sister titles include Fruit Growers News, Organic Grower, and Spudman.

Production and marketing coverage sized for real vegetable farms.

Visit ↗

Checked Aug 30, 2026

Veggie Compass

Software tool

  • Active
  • Free

The UW-Madison whole-farm profit-management tool for diversified vegetable farms. Its old standalone domain was dropped and squatted; this is the real home.

Work out your true cost and profit per crop per sales channel.

Visit ↗

Checked Aug 30, 2026

Vermont Compost Company

Distributor / manufacturer

  • Active
  • Paid

The Montpelier compost-based potting soil maker whose Fort Vee is practically a proper noun among organic market growers.

The transplant mix the organic growers swear by, shipped by the pallet.

Visit ↗

Checked Aug 30, 2026

Wadsworth Control Systems

Distributor / manufacturer

  • Active
  • Paid

The Colorado family firm building greenhouse controls since the 1930s: vent motors, curtain systems, and climate controllers.

One of the oldest names in greenhouse automation, still family-run.

Visit ↗

Checked Aug 30, 2026

Wageningen University and Research

University program

  • Active
  • Free

The world's top agricultural university, in the Netherlands, and the reference point for greenhouse horticulture science.

Where greenhouse growing is studied hardest; their publications set the bar.

Visit ↗

Checked Aug 30, 2026

Web Soil Survey

Software tool

  • Active
  • Free

The official USDA soil survey for nearly every American acre: draw your boundary, get a custom soil report.

Your soil series, drainage class, and capability rating, mapped before you dig.

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Checked Aug 30, 2026

World Ag Expo

Event

  • Active
  • Paid

The largest annual agricultural exposition anywhere, each February in Tulare, California.

Every piece of big iron on earth, three days, one dusty lot.

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Checked Aug 30, 2026

World Agri-Tech Innovation Summit

Event

  • Active
  • Paid

The agtech investment and partnering summit, each March in San Francisco, with a fall edition in London.

Where the money and the technology companies decide what gets built next.

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Checked Aug 30, 2026

World Dairy Expo

Event

  • Active
  • Paid

The global dairy industry's annual meeting, early October in Madison, Wisconsin: cattle shows, equipment, and seminars.

Everything dairy, once a year, one fairgrounds.

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Checked Aug 30, 2026

WSDA organic input list

Dataset

  • Active
  • Free

Washington State's brand-name materials review, the other list certifiers accept nationally.

Cross-check inputs that are not on OMRI; many compliant products appear on only one of the two.

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Checked Aug 30, 2026

WWOOF-USA

Community

  • Active
  • Paid

Worldwide Opportunities on Organic Farms, US chapter: work-exchange learning stays on fifteen hundred organic farms.

Learn by living on farms, or host learners on yours.

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Checked Aug 30, 2026

Xerces pesticide and pollinator guides

Reference work

  • Active
  • Free

Guides to minimizing pesticide risk to pollinators and beneficials, including the uncomfortable truth about which organic pesticides still hurt bees.

Honest answers on spinosad and pyrethrins, and habitat alternatives to spraying.

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Checked Aug 30, 2026

Xerces Society

Organization

  • Active
  • Free

The invertebrate conservation nonprofit: the best free guides anywhere on pollinator habitat, beneficial insects, and pesticide risk.

Regional planting guides and honest answers on which sprays hurt your bees, organic ones included.

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Checked Aug 30, 2026

Your land-grant soil testing lab

University program

  • Active
  • Paid

Every state's extension runs or endorses a soil lab with region-calibrated recommendations; fifteen to thirty dollars a test. Find yours through extension.org.

The starting point of every fertility decision, calibrated for your region's soils.

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Checked Aug 30, 2026

Your public library's makerspace

Maker space

  • Active
  • Free

Many public libraries now run free makerspaces with 3D printers, cutters, and sometimes soldering benches. There is no national directory of them, so the honest advice is the simple one: walk into your county library and ask.

Free, no membership, staffed by people whose whole job is helping you learn, and already in your county.

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Checked Aug 30, 2026

Your state grower conference (pattern)

Event

  • Active
  • Paid

Nearly every state's fruit-and-vegetable association runs a winter conference; the empire-state, mid-atlantic, and southeast regional shows anchor the circuit. Ask your extension office which one is yours.

The winter meeting where your actual neighbors learn; start there before flying anywhere.

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Checked Aug 30, 2026