The Agriculture Resource Library · One search, every shelf

The card catalog.

Every entry in the Library, searchable at once. Type what you are looking for, or work the filters: shelf, kind, cost, openness. Each card says what the thing is and what you get from it, and links out to its owner.

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46 entries

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

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 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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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 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

Every entry links out to its owner — we host nothing, sell nothing, and rank nobody for pay. Each card says what a thing is and what a grower gets from it, in our own words. Links are probed nightly; entries whose sites go quiet are held back or honestly badged rather than served stale. Know a resource we missed? Tell the collective through the Contact page.

Prefer to browse? Start at the Library front door and pick a shelf. Missing something? Suggest a resource.