Do You Need a Federal Permit to Ship Live Microgreen Trays Across State Lines?

No. There is no general federal permit or license you must obtain simply to move an ordinary living plant, including a living microgreen tray, across a state line.

That surprises people, because the internet is full of half remembered warnings about USDA and live plants. What exists federally is narrower than that. Congress gave the Secretary of Agriculture discretionary, pest risk based power to restrict particular movements. It did not build a permit counter that every grower with a van and a tray has to visit.

So two questions decide whether your tray can ship. Is your origin inside a quarantine area for a pest? And what does the receiving state demand of incoming plant material? Everything below is built around those two.

This is the federal layer, like the FDA Produce Safety Rule page. It is deliberately short, because the federal answer is short.

The Plant Protection Act gives discretion, not a permit counter

Read the verb. 7 U.S.C. 7712 says the Secretary may prohibit or restrict the importation, entry, exportation or movement in interstate commerce of any plant, plant product, biological control organism, plant pest or noxious weed, and may require a permit by regulation, when necessary to prevent the introduction or dissemination of a plant pest or noxious weed.

"May" does all the work in that sentence. It is a grant of authority to build specific rules against specific pests, not a rule that binds you today. Until the Secretary has issued a regulation reaching your material, there is nothing there for you to comply with.

The permit people usually have in mind is PPQ 526, and growers waste hours trying to apply for one they do not need. APHIS publishes the categories, and they are all regulated organisms and soil: bees, biological control organisms, butterflies and moths, earthworms, federal noxious weeds and parasitic plants, insects and mites, invertebrate pets, plant growth enhancers, plant pathogens, snails and slugs, and western corn rootworm. APHIS separately describes it as a permit to move live plant pests or noxious weeds. Ordinary plants and ordinary nursery stock are not on that list. A tray of sunflower shoots is not a regulated organism.

Here is the trap that catches careful people. Search for federal rules on moving plants and you land on 7 CFR 319.37, which talks about "plants for planting" and sounds exactly right. It is not. Part 319 is headed "Foreign Quarantine Notices" and section 319.37 sits inside Subpart H. Its definitions concern a consignment moving from one country to another, a foreign phytosanitary certificate, and eligibility for importation. It is an import rule. Useful for its definitions, and nothing more. It does not impose a domestic license on a grower driving a tray from Ohio to Michigan.

What APHIS actually tells you about domestic movement is one instruction: never mail or ship plants or other agricultural items from areas within the United States under federal or state quarantine for an invasive pest, and call your local USDA office to learn whether any quarantine applies. The same guidance notes that Puerto Rico, the U.S. Virgin Islands and Hawaii carry specific federal restrictions for movement to the mainland.

That is the federal posture in one line. It is a quarantine question, not a permit question.

Is a living tray a plant or is it food? Federal law does not say

Three federal texts point three ways, and none was written with a microgreen tray in mind.

Sit with rows three and four together, because that is the real tension. The import rule's test is intent, and a tray marketed for the buyer to snip on a kitchen counter is not intended to remain planted, to be planted, or replanted. It fails that definition on its face. Meanwhile the food rule locates harvest at the cutting of the edible portion from the crop plant, which is a strong textual reason to read an uncut tray as a growing crop rather than as harvested food.

Over the top of both sits the statutory definition, which asks only whether the material is for or capable of propagation. Live tray material often is. You cannot dismiss that just because the purchaser intends to eat rather than plant.

No federal source reviewed here expressly classifies a living microgreen tray for domestic shipment. Not the statute, not the regulations, not APHIS guidance. Do not let a supplier or a marketplace represent a federal determination that has not been published. Where the classification matters, ask the receiving state's plant regulatory agency how it treats that specific tray and that specific growing medium, and keep the written answer. That is not a dodge. The state is the body that would actually stop the shipment, so its classification is the one with consequences.

The one federal duty that is concrete: the Terminal Inspection Act

If you take one operational rule off this page, take this one. Almost no microgreens content mentions it.

7 U.S.C. 7760 makes it unlawful to deposit in the United States mails a package containing any plant or plant product, addressed into a state or territory maintaining approved terminal inspection for that plant or plant product, unless the package is plainly marked so that its contents can be readily ascertained from the outside. The statutory maximum for failing to mark is a fixed $100. The text does not inflation adjust it.

Notice what the offense is. It is not shipping the plant. It is mailing it unmarked.

Two limits matter enormously in practice.

It bites only where the destination maintains approved terminal inspection for that item. That approved list is the trigger for the whole mechanism, and here is the frustrating part: neither the statute nor current USPS Publication 14 publishes a consolidated list naming which states and territories presently maintain USDA approved terminal inspection lists. USPS says that information may be obtained from USDA rather than publishing it. Not published is not the same as does not exist. If you mail trays, phone USDA APHIS Plant Protection and Quarantine's Pest Permits Team on 301-851-2285, alternate 866-524-5421, and confirm with the receiving state's plant regulatory agency before the parcel goes out.

It is a mailing rule, so it does not reach a courier. The prohibition is on depositing the package in the "United States mails", and USPS likewise describes the Act as a rule for a person who mails a package. Sending the same tray by private courier does not commit this offense. That does not make courier shipping unregulated: federal pest quarantines and the destination state's nursery stock and quarantine rules still apply. It means this particular marking offense should not be stretched to cover a courier without another rule that does.

One thing the statute does not do is settle the plant versus plant product question above. It speaks of "any package containing any plant or plant product", broad enough to reach a living tray, without telling you which one a tray is.

Why the receiving state is where the real pressure comes from

Federal law preempts states here, then hands most of the power back.

7 U.S.C. 7756(b) stops a state from regulating interstate movement for plant pest or noxious weed control where the Secretary has issued a federal regulation or order on that pest. But a state may impose restrictions consistent with and no greater than the federal rule, and it may impose additional restrictions where it demonstrates a special need, based on sound scientific data or a thorough risk assessment, and the Secretary so finds.

That exception is not theoretical. APHIS runs a published process: the state agriculture department submits the request with sound scientific data and a thorough risk assessment showing the pest is absent from the state but could cause economic or environmental harm; APHIS publishes a Federal Register notice; the public gets 60 days to comment; APHIS then publishes a grant or denial. A granted exemption lasts 2 years, after which the state must request renewal.

Then comes the mechanism that catches growers who checked the federal quarantine list and thought they were done. A pest with no broad federal domestic quarantine can still stop your shipment at a state line. 7 CFR Part 301, Domestic Quarantine Notices, is organized by individual pest programs, among them fruit flies, Japanese beetle, Asian longhorned beetle, citrus canker, imported fire ant, golden nematode and Phytophthora ramorum. There is no universal category called "live plants". So your first factual question is narrow: is my production county or other origin location inside a regulated area for a pest whose regulated articles include the tray, the plants or the growing medium? If no, that quarantine is not your problem. If yes, read that program's exact regulated article and movement conditions.

Beyond Part 301 sits FRSMP, the Federally Recognized State Managed Phytosanitary Program. APHIS describes it as promoting consistent action against certain plant pests moving interstate or arriving at ports, harmonizing import and interstate requirements. The consequence for you: state managed phytosanitary measures, including a federally recognized program where one applies, can impose destination specific conditions with no broad federal quarantine in place. APHIS publishes frsmp@usda.gov as the contact.

The practical index for all of this is not USDA. Start with the National Plant Board's State Law and Regulation Summaries, then open the current PDF for the receiving state. The Board describes it as a reference tool for those involved in interstate transport of regulated plants and plant products, with state members updating individual summaries periodically, so check the displayed update date before relying on it. USDA remains essential for federal pest quarantines, but it is not the index for what a destination state demands at entry.

What is voluntary, and what is not domestic at all

Three programs come up constantly and all three get misdescribed. None is a domestic federal license for shipping microgreens.

USNCP is still worth reading for one reason. Its program definitions turn on intent, the same axis as the import rule, and they line up the same way: "Nursery Stock" means any plant for planting, propagation or ornamentation, and "Plant" means living plants and parts intended for planting. A live tray marketed for cutting and eating sits outside the evident purpose of both, absent any plan to plant, propagate or ornament it. Treat that as supporting definitional evidence only, not a controlling domestic rule and not an official federal classification of microgreen trays.

Finally the Federal Seed Act, which reaches you only in the seed shipment scenario. USDA AMS describes it as a truth in labeling law for agricultural and vegetable seed shipped in interstate commerce, requiring those shipments to carry specified quality information for buyers. Buying seed, including having seed shipped to you, does not make you the person making an interstate seed shipment. Ship or sell seed across a state line yourself and the labeling duties are yours. Selling a harvested product or a living tray is not an interstate seed shipment merely because seed was used to grow it.

Frequently Asked Questions

Q: Do I need a USDA permit to ship live microgreen trays to another state? A: Not as a general matter. The Plant Protection Act gives the Secretary discretionary authority to require permits for specific pest risks, and the PPQ 526 categories do not include ordinary plants or nursery stock. Check your quarantine status and the receiving state's rules instead.

Q: Is a live tray legally a plant or is it food? A: No federal source resolves it. The statutory definition of plant turns on capacity for propagation, the import rule definition turns on intent to remain planted, and the food rule puts harvest at the cutting of the edible portion from the crop plant. Ask the receiving state how it classifies your tray and medium.

Q: I found 7 CFR 319.37 and it looks like it covers me. Does it? A: Almost certainly not. Part 319 is Foreign Quarantine Notices and 319.37 is an import rule in Subpart H. It is useful for its definitions and imposes no domestic shipping license.

Q: Can I just put a tray in the mail? A: Only if you mark it properly. 7 U.S.C. 7760 makes it unlawful to mail plant material into a state maintaining approved terminal inspection unless the outside is plainly marked so the contents can be readily ascertained, with a $100 statutory maximum for failing to mark. Confirm the destination's status first, because the current list of those states is not published.

Q: The pest my state worries about has no federal quarantine. Am I clear? A: Not necessarily. Preemption carries a special need exception, and state managed phytosanitary programs can impose destination specific conditions where no broad federal quarantine exists.

Final thoughts

The federal picture is thinner than growers expect, and the thinness is the point. There is no permit to apply for, no federal nursery certification you are quietly out of compliance with, and no published federal ruling on what a living tray is. What there is: a mailing rule with a $100 marking penalty, a quarantine question that depends on where you grow, and a receiving state that holds the real leverage.

So do the two checks. Call your local USDA office and ask whether any federal or state quarantine covers your origin. Then open the National Plant Board summary for the destination state, and if the answer is not obvious, phone that state's plant regulatory agency and get it in writing. Nobody at the federal level will hand you a determination the state then has to honor.

Nothing here is a determination that any particular tray may be shipped. It is the map of which body decides.

If a state agency told you something that contradicts this page, tell me and I will check it. A page that is wrong about a rule is worse than no page.

Sources

Every claim above traces to one of these. All checked 7 August 2026.