Can THCA be shipped? USPS, carriers and the Dec. 11 change
The Postal Service mails hemp only on conditions, FedEx refuses hemp flower and UPS takes it only under contract. On Dec. 11 high-THCA flower stops being hemp and becomes nonmailable. Checked Oct. 3.
The short answer. As of Oct. 3, 2026, THCA flower can be mailed in the United States only as hemp: the Postal Service accepts it when it tests at or under 0.3 percent delta-9 THC and the sender follows federal, state and local law and keeps records (USPS Publication 52, sec. 453.37). FedEx refuses hemp flower outright. On Dec. 11, 2026, high-THCA flower stops being hemp and becomes nonmailable to ordinary customers.
WASHINGTON — Whether a bag of flower can travel by parcel depends on three separate rulebooks: the Postal Service’s mailability rules, each private carrier’s contract terms, and the law of the state at the delivery address. The desk read all three. This is what each says today and what changes in ten weeks.
The rules, carrier by carrier
| Channel | Rule as of Oct. 3, 2026 | From Dec. 11, 2026 | Source |
|---|---|---|---|
| U.S. Postal Service | Hemp and hemp products at or under 0.3% THC are mailable domestically if the mailer complies with all applicable laws and keeps lab results, licenses or compliance reports for 3 years. No international, APO, FPO or DPO mail. | Flower above 0.3% total THC is a controlled substance. Mailable only when sender and addressee are both DEA-registered (or exempt). | Pub. 52, sec. 453.37 and 453.31 |
| FedEx | Prohibits “raw or unrefined hemp plants, or their subparts,” naming hemp flowers, and any product above 0.3% delta-9 THC. | Unchanged: still prohibited. | FedEx Service Guide, effective Jan. 5, 2026 |
| UPS | Lists “Hemp and CBD” among restricted items it accepts “on a contractual basis for shippers with regular volume and the ability to comply with all applicable laws.” Marijuana is prohibited. | Flower that is marijuana under federal law falls on the prohibited list. | UPS prohibited and restricted items, archived Feb. 13, 2025 |
| Destination state | Varies. Tennessee makes it unlawful to ship hemp-derived cannabinoid products directly to consumers or deliver them by delivery service. | State laws keep running on their own clocks. | Tenn. Public Chapter 526, sec. 57-7-113 |
UPS’s live policy page refused the desk’s requests on Oct. 3, so the UPS row relies on the most recent archived copy. Check the current UPS tariff before relying on it.
What Publication 52 actually requires
Section 453.37 of Publication 52, the Postal Service’s handbook on hazardous, restricted and perishable mail, defines hemp by pointing to federal law: the 2018 Farm Bill definition at 7 U.S.C. 1639o, “or any successor provision.” That last phrase matters. The Postal Service does not need to rewrite its rule on Dec. 11, because its rule follows whatever the statute says.
Today the conditions are:
- The THC limit. Hemp “with the tetrahydrocannabinol (THC) concentration of such hemp (or its derivatives) not exceeding a 0.3 percent limit.”
- Compliance. The mailer must follow “all applicable federal, state, and local laws,” including the USDA hemp production rules at 7 CFR Part 990.
- Records. The mailer must keep lab test results, licenses or compliance reports for at least three years after mailing.
- Domestic only. Hemp and CBD may not go by international mail, including to military and diplomatic addresses.
Section 453.2 puts the burden of compliance on the mailer, not the Postal Service.
What changes on Dec. 11
Section 781 of Public Law 119-37 replaces the delta-9 test with “a total tetrahydrocannabinols concentration (including tetrahydrocannabinolic acid) of not more than 0.3 percent.” H.R. 6500 set that change for THCA flower on Dec. 11. Flower with 20 percent THCA fails the new test by a wide margin, so it leaves the hemp definition and becomes marijuana under 21 U.S.C. 802(16).
Once that happens, section 453.31 of Publication 52 governs instead. Mailing a controlled substance is unlawful under 18 U.S.C. 1716 whenever distributing it is unlawful, and the mail accepts controlled substances only when both sender and addressee are registered with the DEA or exempt from registration. A retail buyer of THCA flower is neither. Our hemp ban tracker follows the date in case Congress moves it again.
Does rescheduling change any of this?
No. The April 2026 order that moved some marijuana to Schedule III covers only FDA-approved drugs and marijuana held under a state medical license (91 FR 22714). A Schedule III substance is still a controlled substance under section 453.31. Georgia’s medical cannabis commission adopted a rule on Sept. 30 allowing licensed medical deliveries by mail and private carrier, but the Postal Service told Marijuana Moment it had “nothing additional to offer at this time.” Our rescheduling report has the details.
State law at the delivery address
A parcel that is lawful to mail can still be unlawful to receive. Tennessee is the clearest case. Its hemp law, enforced from July 1, 2026, bans the sale of THCA (Tennessee Lookout, May 28). The statute, Public Chapter 526, goes further than most: section 57-7-113 makes it unlawful “to ship an HDCP directly to a consumer in this state” or “to utilize a delivery service to deliver an HDCP to a consumer” (an HDCP is a hemp-derived cannabinoid product), and retail sales must happen face to face at a licensed store. Texas and California close their hemp-retail lanes to THCA flower under their own rules as well. See our pages on Tennessee, Texas and California.
What to check before a package moves
- The lab report. Through Dec. 10, the delta-9 figure decides mailability. From Dec. 11, the total THC line does. Our COA guide shows where each appears.
- The destination state’s page. Hemp-lane status and possession rules differ by state; see Is THCA legal?
- The carrier. FedEx’s prohibition applies whatever the lab report says.
Primary sources
- USPS Publication 52, sec. 453, Controlled Substances and Drugs, including 453.37 Hemp-Based Products
- FedEx Service Guide, effective Jan. 5, 2026, prohibited items 20 and 21
- P.L. 119-37, sec. 781 and H.R. 6500, sec. 2019
- 21 U.S.C. 802(16), definition of marijuana
- Tennessee Public Chapter 526 (2025), sec. 57-7-113, direct-to-consumer shipping and delivery
Last reviewed Oct. 3, 2026. This is reporting, not legal advice. Ask a lawyer licensed in your state.
Questions readers asked
Is it legal to mail THCA flower through USPS?
As of Oct. 3, 2026, yes, if the flower meets the federal hemp definition (no more than 0.3 percent delta-9 THC by dry weight) and the mailer follows federal, state and local law and keeps lab results and licenses for three years, under USPS Publication 52, section 453.37. International mail is not allowed.
Can THCA be shipped after Dec. 11, 2026?
Not as hemp. From Dec. 11 the hemp definition that USPS relies on counts THCA, so flower above 0.3 percent total THC becomes marijuana, a controlled substance. Publication 52 lets controlled substances travel by mail only between DEA-registered senders and recipients.
Does FedEx ship hemp flower?
No. FedEx's 2026 Service Guide lists raw or unrefined hemp plants and their parts, hemp flowers included, as prohibited items. The only exception it gives is the narrow plant material exempted at 21 CFR 1308.35.
Can THCA be delivered to Tennessee?
No. Tennessee's hemp law, enforced since July 1, 2026, makes it unlawful to ship a hemp-derived cannabinoid product directly to a consumer in the state or to use a delivery service to deliver one, and it excludes THCA above 0.3 percent from lawful hemp products. A carrier's willingness to take a parcel does not change state law at the destination.
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