Yes, you can mail seeds. Sending seeds through the mail is legal both within the United States and to other countries, but the rules tighten quickly once you cross state lines commercially, ship internationally, or handle certain restricted species. Federal agencies including the USDA and USPS regulate labeling, permits, and inspections, and violations can cost up to $50,000 per person in civil penalties.
Mailing Seeds Inside the United States
Domestically, seeds are mailable through USPS the same way other plant products are, provided the shipment complies with federal agricultural and conservation laws. Ignore those laws and the seeds become nonmailable.1USPS. 56 Plants – Postal Explorer A packet of tomato or flower seeds going to a friend needs no permit. A commercial shipment crossing state lines is a different story.
Commercial Sellers and the Federal Seed Act
The Federal Seed Act is a truth-in-labeling law that the USDA’s Agricultural Marketing Service enforces on agricultural and vegetable seeds sold in interstate commerce. If you sell seeds by mail across state lines, each package label needs the kind and variety of seed, purity percentage, germination percentage, noxious weed seeds per pound, and your name and address as the shipper.2Agricultural Marketing Service. Federal Seed Act Chemically treated seeds also require a label identifying the treatment.3eCFR. 7 CFR Part 201 – Federal Seed Act Requirements
Many states add their own seed laws on top of the federal ones, and some require a seed dealer license for commercial sales, typically for a modest annual fee. Check the seed law in your state and the buyer’s state before you ship.
Casual Gardeners and Seed Swaps
The Federal Seed Act carves out a limited exemption for farmers selling seeds they grew on their own land directly to a buyer, provided they aren’t in the business of reselling seeds from other sources. Even that exempt seed still has to comply with the destination state’s seed laws.4Office of the Law Revision Counsel. 7 U.S. Code 1573 – Exemptions The Act does not explicitly address casual swaps between gardeners. Someone mailing a few packets of heirloom seeds to a friend is unlikely to trigger federal enforcement, but the law regulates seeds “shipped in interstate commerce” without a clear hobby carve-out.
Sending Seeds Out of the Country
Most countries will not admit seeds without a phytosanitary certificate. APHIS issues these after inspecting the seeds and confirming they are free from pests and diseases the destination country cares about.5Animal and Plant Health Inspection Service. Plant and Plant Product Exports You apply through the Phytosanitary Certificate Issuance and Tracking (PCIT) system.6Animal and Plant Health Inspection Service. Exporter Responsibilities (Plants and Plant Products)
APHIS charges $61 for non-commercial shipments valued under $1,250 and $106 for commercial shipments worth $1,250 or more. A state or county agency issuing the certificate through PCIT adds a $6 administrative fee.7Animal and Plant Health Inspection Service. User Fees for Export Certification of Plants and Plant Products The destination country’s own import rules are your responsibility too, and they vary widely.
Receiving Seeds From Abroad
Most seeds imported into the United States require a PPQ 587 permit, applied for through APHIS eFile. The permit is free. The one exception: importing CITES-listed species for commercial purposes requires a $70 Protected Plant Permit.8USDA APHIS. Guidance to Applicants for Permits to Import Plant Material Every packet in the shipment must be labeled with the seller’s name, the scientific name of the plant, and the country of origin.9Animal and Plant Health Inspection Service. Seeds With Special Requirements and Prohibited Seeds
When permit instructions call for it, green and yellow shipping labels (PPQ Form 508) go on the outside of the package. Those labels route the shipment to an APHIS Plant Inspection Station for examination before it reaches you. Packages without the label on the exterior can be refused entry even if the label is inside.10Animal and Plant Health Inspection Service. Shipping Requirements for Importing Regulated Soil Requiring Black, White, Green, Yellow Labels You can download labels through eFile after the permit is approved.
The Small Lots of Seed Program
APHIS runs a streamlined pathway for small imports. To qualify, each packet holds no more than 50 seeds or 10 grams of a single species, and the whole shipment stays under 50 packets. Tomato and pepper seeds are not eligible.9Animal and Plant Health Inspection Service. Seeds With Special Requirements and Prohibited Seeds Small lots imported under a PPQ 587 can enter without a phytosanitary certificate from the exporting country, which removes a real cost and paperwork barrier.11United States Department of Agriculture. PPQ Form 587 – Application for Permit to Import Plants or Plant Products
Seeds You Can’t Freely Mail
Some categories of seeds sit outside the normal permit pathway. Restrictions range from “you need a special permit” to a flat no.
Federal Noxious Weeds and Parasitic Plants
Federal noxious weed seeds are heavily restricted, not banned outright. APHIS requires a specific permit (PPQ Form 526) to import or move them across state lines, and the same permit covers parasitic plants. Shipments must travel in escape-proof containers with a copy of the permit inside and a PPQ 599 shipping label on the outside. The USDA defines a noxious weed broadly as any plant that can directly or indirectly injure crops, livestock, natural resources, public health, or the environment.12Animal and Plant Health Inspection Service. Federal Noxious Weeds
CITES and Endangered Species
Seeds of species protected under CITES or the Endangered Species Act carry extra layers of regulation. The USDA enforces CITES and ESA rules for plant imports and exports, while the U.S. Fish and Wildlife Service issues export and re-export permits for CITES-protected plants leaving the country and requires import permits for wild-collected Appendix I species. Importers of live CITES-listed seeds also need a standard nursery stock import permit alongside the Protected Plant Permit, and the shipment must enter through a designated port.13Animal and Plant Health Inspection Service. CITES – Endangered Plant Species
Hemp and Cannabis Seeds
The 2018 Farm Bill legalized hemp by defining it as cannabis with THC of no more than 0.3 percent on a dry weight basis and explicitly protected interstate commerce in hemp.14Agricultural Marketing Service. Farm Bill Legalized Hemp Hemp seeds meeting that threshold are mailable domestically through USPS, but only if the mailer complies with all applicable federal, state, and local hemp production laws and keeps compliance records (lab test results, licenses, or compliance reports) for at least three years after mailing.15USPS. Publication 52 Revision – Hemp-based Products Update
Hemp and hemp-based products are prohibited in all international mail, including shipments to APO, FPO, and DPO addresses.15USPS. Publication 52 Revision – Hemp-based Products Update Cannabis seeds above the 0.3 percent THC threshold remain a controlled substance under federal law and are not mailable at all.
What It Costs and How Long It Takes
The permit fees are modest. PPQ 587 import permits are free. Phytosanitary certificates for exports run $61 for non-commercial shipments and $106 for commercial ones.7Animal and Plant Health Inspection Service. User Fees for Export Certification of Plants and Plant Products Time is where costs stack up. Standard PPQ 587 applications usually process within a few weeks. Controlled import permits for higher-risk material can take 30 to 45 days when the application is complete, and 120 days or longer for complex imports needing facility inspections or extra risk evaluation.16Animal and Plant Health Inspection Service. Controlled Import Permits – Frequently Asked Questions
Commercial importers may also need a state seed dealer license, generally $10 to $40 annually. Professional seed testing for purity and germination, sometimes needed to satisfy Federal Seed Act labeling, typically runs $15 to $70 per sample depending on species and tests.
Penalties for Getting It Wrong
Federal Seed Act labeling violations carry a civil penalty the USDA adjusts periodically for inflation. The most recently published maximum was $2,020 per violation.17Agricultural Marketing Service. USDA AMS Updates Penalties for Violations of the Federal Seed Act Mislabeled seed is the usual trigger: wrong germination rate, missing purity data, unlisted chemical treatment.
Illegally importing or moving restricted seeds falls under the Plant Protection Act, and the numbers get much larger. An individual faces up to $50,000 in civil penalties per violation, though first-time violators who moved regulated seeds without any profit motive are capped at $1,000. Businesses can be fined up to $250,000 per violation, with a ceiling of $1,000,000 for all violations in a single proceeding if any are willful.18Office of the Law Revision Counsel. 7 USC 7734 – Penalties for Violation
Criminal penalties can also apply. Knowingly importing or exporting seeds in violation of the Act for distribution or sale can mean up to five years in prison, doubling to ten on a second conviction.18Office of the Law Revision Counsel. 7 USC 7734 – Penalties for Violation At a minimum, port inspectors who find prohibited or restricted seeds in your package will confiscate the ineligible material.
Packaging the Shipment
Seeds should sit in sealed packets or padded envelopes that won’t spill in transit. International packages need to be free from soil, loose plant debris, and any material other than the seeds themselves. Customs declarations should accurately list the contents as seeds, with the botanical name and quantity. Writing “gift” or leaving the description vague is a reliable way to get a package held or destroyed at the border.
Domestic mail needs only standard USPS postage by weight. Tracking is worth the small cost, especially on commercial shipments where you need proof of delivery. On international packages, attach any required APHIS shipping labels to the exterior and include a domestic return waybill inside so the package can reach you after inspection at the Plant Inspection Station.10Animal and Plant Health Inspection Service. Shipping Requirements for Importing Regulated Soil Requiring Black, White, Green, Yellow Labels
If Seeds Show Up That You Didn’t Order
Don’t plant them. The 2020 mystery-seed episode, when thousands of Americans received unsolicited seed packets from overseas, is exactly the risk APHIS worries about: pests, diseases, or invasive species arriving under the radar. Place the unopened packet and all packaging, including the mailing label, into a sealable bag and then into a mailing envelope, and send it to the designated USDA or state agriculture department collection point in your state. If the packet is already open, seal the seeds in a zip-lock bag first.19USDA APHIS. USDA Updates List of Locations Where the Public Can Send Unsolicited Seeds Include your name, address, and phone number so an inspector can follow up if needed.