You can mail plants within the United States, and the U.S. Postal Service treats most live plants and seeds as mailable as long as the shipment complies with USDA agricultural rules.1USPS Postal Explorer. 56 Plants UPS and FedEx also accept live plants under their own conditions. The rules get stricter when soil, quarantined pests, federally listed noxious weeds, Hawaii, Puerto Rico, or an international border are involved, and the penalties for getting it wrong reach into six figures.
What You Can and Can’t Put in the Mail
The basic federal rule is simple. If a plant is legal to move under USDA rules, the post office will carry it. If USDA quarantine rules prohibit it, the shipment is nonmailable. Under 39 U.S.C. § 3014(b), any plant or plant product capable of carrying a dangerous disease or pest infestation is nonmailable when shipped from a quarantined area in violation of the Plant Protection Act.2USPS Postal Explorer. 562 Quarantines
Two categories are off-limits regardless of how well you package them:
Federal noxious weeds. The USDA maintains a Federal Noxious Weed list covering aquatic and wetland species, parasitic plants, and terrestrial weeds. The Plant Protection Act defines a noxious weed as any plant that can injure crops, livestock, natural resources, public health, or the environment.3Animal and Plant Health Inspection Service. Federal Noxious Weeds Moving these species interstate requires a PPQ Form 526 permit from APHIS, which is typically issued only for research under strict containment.
Plants under active quarantine. Beyond the noxious weed list, APHIS restricts movement of plants that pose specific pest risks. Citrus nursery stock, for example, faces movement restrictions in areas dealing with citrus greening disease. Quarantines shift as outbreaks emerge and recede, so checking the APHIS quarantine page for your specific plant and origin state before shipping is worth the few minutes.
Seeds sit under the same framework. USPS Publication 52 groups plants, seeds, and plant materials, including fruits and vegetables, under the same rules.4USPS. Publication 52 – Hazardous, Restricted, and Perishable Mail A noxious weed seed is as illegal to mail as the live plant. Common garden and vegetable seeds move through the mail without incident because they aren’t quarantine-regulated and carry no soil.
Soil Is Regulated Separately
Soil is where hobbyist shippers most often trip. It can harbor insects, fungi, bacteria, and nematodes invisible to the eye, so APHIS regulates it under 7 CFR 330.
Within the continental United States, soil can generally move interstate without a special APHIS permit, subject to any quarantine restrictions under 7 CFR 301.5eCFR. 7 CFR 330.203 – Soil The safest domestic practice is still bare-root or a soilless growing medium, which sidesteps the whole issue.
Soil moving to or from Hawaii, Puerto Rico, the U.S. Virgin Islands, or other U.S. territories is treated the same as foreign soil, and an interstate movement permit is required before shipping.6Animal and Plant Health Inspection Service. Soil
Shipping to Hawaii, Puerto Rico, and Other Territories
States run their own agricultural inspection programs on top of the federal rules, and Hawaii and Puerto Rico are the strictest destinations.
All plants and propagating material entering Puerto Rico must be free of soil and foreign matter, accompanied by an inspection certificate from the origin state’s plant quarantine authority, and labeled with the consignee’s name and the plant’s common or scientific name. Puerto Rico also prohibits all palm plants and seeds, all coffee plants and seeds, and citrus nursery stock from certain states.7Puerto Rico Department of Agriculture. Puerto Rico Summary of Plant Protection Regulations
Parcels entering Hawaii by mail or cargo must be clearly labeled with the words “Plant Materials” or “Agricultural Commodities,” and shipments go through agricultural inspection on arrival. Before you ship to either destination, call the receiving state or territory’s department of agriculture. That one call is what stands between a healthy plant and a package destroyed at the border.
Mailing Plants Internationally
Crossing a national border layers two regulatory systems on top of the domestic rules: U.S. export requirements and the destination country’s import requirements.
Most countries require a phytosanitary certificate before allowing a plant shipment through customs. APHIS issues these certificates after inspecting the plants and confirming they conform to the importing country’s regulations. The exporter is responsible for contacting the local APHIS office early enough for inspection, testing, and certification to happen before shipping.8Animal and Plant Health Inspection Service. Exporter Responsibilities for Plants and Plant Products Many destination countries also require the recipient to hold an import permit before the shipment leaves the origin country.
If the plant is an orchid, cactus, succulent, or anything else potentially covered by the Convention on International Trade in Endangered Species, a separate CITES permit process applies through the U.S. Fish and Wildlife Service. Nearly all orchid species and nearly all cacti are listed under CITES Appendix II, meaning international trade requires an export permit.9CITES Secretariat. CITES Appendices I, II and III Wild-collected Appendix I plants need both an export permit from the origin country and an import permit from the destination.10U.S. Fish and Wildlife Service. 3-200-32 Export/Re-Export of Plants and Plant Products under CITES A single wild-collected orchid with no paperwork can trigger a seizure and a fine. When in doubt, check the species against the CITES database before shipping.
What Happens if You Break the Rules
The Plant Protection Act’s penalties scale with intent and repeat behavior:
- Civil penalties up to $1,000 for first-time non-commercial violations by an individual who moves regulated plants without monetary gain.
- Up to $50,000 per violation for individuals, and up to $250,000 for businesses or other entities.
- Up to $1,000,000 for all violations in a single proceeding that includes a willful violation.
- Up to one year in prison for knowingly violating the Act, up to five years for knowingly moving plants for distribution or sale, and up to 10 years for second and subsequent convictions.
The Lacey Act adds a second layer. It prohibits trafficking in plants that were taken, transported, or sold in violation of any underlying law, and its civil forfeiture provisions operate on strict liability: your plants can be seized whether or not you knew they were illegal. Criminal penalties under the Lacey Act reach up to five years in prison and $250,000 in fines for individuals when the offense involves importation or sales exceeding $350 in market value.12Animal and Plant Health Inspection Service. Frequently Asked Questions About Lacey Act Declaration
Packing a Plant So It Arrives Alive
Legality is one problem. Keeping the plant alive in a cardboard box for two or three days is another. The goal is moist roots, dry foliage, and a package stable enough to survive a sorting belt.
Prepare the Roots
Bare-root shipping is the safest approach because it avoids soil-related regulatory issues entirely. Remove the plant from its pot, shake off as much growing medium as possible, and wrap the roots in damp sphagnum moss or moist paper towels. Seal the root ball in a plastic bag to retain moisture, but leave the foliage outside the bag so it can breathe. For potted plants you’d rather not disturb, cover the soil surface with plastic wrap secured around the stem to prevent spillage, and tape the pot to a piece of cardboard so it can’t tip.
Plan for Temperature
Most plants ship safely between roughly 40°F and 70°F. In winter, a 72-hour heat pack placed inside the box but not touching the plant can prevent freezing. In summer, gel ice packs wrapped in newspaper help keep the interior cool. Insulated boxes or foil liners add another layer in extreme weather. Check the forecast at both ends before you drop the package off, and delay a day or two if a heat wave or cold snap is coming.
Box and Cushion
Choose a sturdy box slightly larger than the plant to leave room for cushioning. Wrap leaves and branches loosely in tissue paper or soft bubble wrap; tight wrapping traps moisture and promotes mold. Fill every gap with crumpled newspaper, packing peanuts, or foam so the plant can’t shift. Prune dead or damaged growth before packing, since it can rot in transit and spread to healthy tissue.
Label and Choose the Right Service
Mark the outside of the box clearly with “Live Plants,” “Perishable,” and “This End Up,” and include both sender and recipient contact information. USPS Priority Mail Express and Priority Mail are the most common choices for plant shipments. Private carriers offer overnight and two-day options that work well for high-value or fragile specimens. Avoid ground shipping during summer and winter, when the extra days in warehouse temperatures can be lethal. Get a tracking number and make sure the recipient can bring the package inside promptly. A plant that survives three days in a box can still die sitting on a hot porch for an afternoon.
Carrier and Insurance Caveats
Even legal, well-packed shipments carry risk on the carrier side. USPS classifies plants as perishable matter, which means they ship at the mailer’s own risk; if your plant arrives dead, USPS has no obligation to compensate you.13USPS. DMM 601 Mailability UPS accepts live plants but prohibits any plant listed as an endangered species by the U.S. Fish and Wildlife Service.14UPS. How To Ship Plants and Live Animals Some freight carriers refuse plants entirely.
Standard declared-value coverage typically excludes perishables, so a damaged or dead-on-arrival plant usually won’t be covered. Third-party perishable insurance exists but comes with higher premiums and narrow claim windows. Speed is the better insurance: overnight or two-day service dramatically reduces the risk of heat, cold, or dehydration killing the plant before it arrives.