Seed libraries and the law.

Why seed laws exist.

Every state has a seed law, and they are older than most people guess. Connecticut passed the first in 1821, aimed at seed contaminated with Canada thistle; Illinois followed in 1867. By 1928, 45 states regulated seed. These laws protect buyers: a company selling seed has to be licensed, test its germination, and label each package with the variety, the germination rate and any weed seed. None of them were written with a library cabinet in mind, and some were worded broadly enough that giving seed away looked like selling it.

2014: the letters.

In June 2014 the Pennsylvania Department of Agriculture wrote to the Joseph T. Simpson Public Library in Mechanicsburg, which had opened a seed library that April, saying it was acting as a seed distributor under the state's Seed Act of 2004 without a license, testing or labels. The library was not shut down, as many reports said; it agreed to hand out only commercially packaged seed that year and to hold seed swaps instead of taking back home-saved seed.

Later that year the Minnesota Department of Agriculture told the Duluth Public Library its seed-sharing program broke the state seed law because the seed was not tested or labeled. Testing was the real barrier: labs typically test about 400 seeds to get a valid result, and a library patron might return a few dozen. Duluth's city council passed a resolution in support of seed sharing that December.

2015 and 2016: the fixes.

Seed-sharing advocates, led by the Sustainable Economies Law Center, went to the legislatures. Minnesota passed the first state exemption for noncommercial seed sharing in May 2015. Nebraska defined "seed library" in law that year and took donations to and from one out of the meaning of "sale." Illinois and California followed in 2016, California with the Seed Exchange Democracy Act that September. Pennsylvania's department concluded in 2016 that free seed libraries are not selling seed, and wrote that into policy in 2018.

On July 14, 2016, the Association of American Seed Control Officials added noncommercial seed-sharing rules to its Recommended Uniform State Seed Law, the model most state seed laws follow. It is a lighter rulebook, not a blanket exemption:

• No money changes hands, and the sharer "may not expect, or create the expectation, that seeds must be returned."
• Each packet is labeled with the kind and variety, whether it is treated, a traceability reference, the sharer's name and city, and the month and year it was donated.
• Packets hold no more than 4 ounces of vegetable or flower seed, or 8 ounces of agricultural seed. Germination tests are optional.
• A sign at the seed library says the seed may not meet the state's germination or purity standards, and that patented or PVP-protected varieties are not accepted without the owner's permission.

The model binds no one until a state adopts it. Georgia did by regulation in 2017, West Virginia by statute in 2020, and Indiana by policy. Alaska passed its own seed-library law in 2018, and Ohio its exemption in 2025.

What it means today.

Every exemption and the model rules draw the same line: commercial versus noncommercial. In states that have adopted one, a free seed library falls outside the rules written for seed companies or follows a much lighter version of them. Everywhere else it comes down to the statute's wording. In the table below, "the law is written around sales" means every duty in the statute attaches to selling seed, which leaves a free seed library outside it on the plain words. "Reaches free distribution" means the statute's own words, such as "distribute" or "otherwise supply," could be read to cover a free seed library even though nobody we found has tried.

Tennessee.

Tennessee's seed law is the Tennessee Seed Law of 1986, Tenn. Code Ann. Title 43, Chapter 10. Section 43-10-109 makes it unlawful to "transport, offer for transportation, sell, distribute, offer or expose for sale" agricultural or vegetable seed for planting without a seed license, a germination test within the past nine months, and a proper label. The exemptions in section 43-10-110 cover seed not meant for planting, seed going to be cleaned, a grower selling on the farm, and carriers. There is no exemption for free seed sharing or seed libraries, and we found no Tennessee bill that proposed one.

In practice, Tennessee seed libraries run openly, in Nashville, Memphis, Knoxville, Chattanooga, Maryville, Kingsport and more than a dozen other places, and we found no reported enforcement. The prudent course for a Tennessee seed library is to follow the model rules above (labels, the sign, packets under 4 ounces, returns invited and never required) and to ask the Tennessee Department of Agriculture's Ag Inputs program for its position in writing.

State by state.

Our reading of statute text as published in September 2026; for several states the implementing rules were not reviewed. Counts: seed sharing exempt by statute 6; seed-sharing rules by regulation 2; seed-sharing rules written into statute 1; covered by written agency policy 2; garden seed outside the seed law 1; no seed law 1; no exemption; the law is written around sales 11; no exemption; labeling reaches seed moved for planting 9; no exemption; the law reaches free distribution 14; no exemption found; review incomplete 4.

What a seed library should do.

• Keep it free. No fees, no suggested donations tied to seed, no seed as payment for volunteer work.
• Invite returns; never require them.
• Label every packet with the crop and variety, hybrid if it is one, treated or not, a lot number, your name and city, and the month and year donated.
• Post the sign. The seed may not meet state germination or purity standards; no patented or PVP-protected seed without permission.
• Keep packets small, 4 ounces or less for vegetable and flower seed.
• Ask your state department of agriculture for a written position, especially in a state with no exemption.

The starting a seed library guide has the label checklist and sign wording ready to print.