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The 2026 hemp ban, explained

By Alec · Writer & Researcher

Alec writes and researches The Leaf Concierge's education library, covering THCA chemistry, hemp law, and how to read a certificate of analysis (COA).

Last verified: , against the official text linked in the sources below. Dates in this area have already moved once; check the sources for the current text.

Disclaimer: This article is general information, not legal advice. Hemp law varies by state and changes. For an answer about a specific situation, consult a licensed attorney and check official resources (USDA, your state department of agriculture, and, in Florida, FDACS).

The “2026 hemp ban” is shorthand for a change to the federal definition of hemp. Public Law 119-37 section 781 replaces the 2018 delta-9-only test with a total THC test that counts THCA, and adds a 0.4 mg per-container cap for final hemp-derived cannabinoid products. Public Law 119-103 section 2019 then staged when each part applies: November 12, 2026 for one narrow class, and December 11, 2026 for the rest.

The dates that matter

  1. December 20, 2018. The 2018 Farm Bill (Public Law 115-334) defines hemp as cannabis with a delta-9 THC concentration of not more than 0.3% on a dry weight basis. That is still the text codified in 7 U.S.C. 1639o(1) until section 781 takes effect.
  2. November 12, 2025. Public Law 119-37 is signed. Division B, section 781 rewrites that definition, effective 365 days after enactment.
  3. September 2, 2026. Public Law 119-103 is signed. Section 2019 says that until December 11, 2026, the section 781 amendments apply only to products described in 7 U.S.C. 1639o(1)(C)(ii)(I) and (iv)(I), the cannabinoids that are not capable of being naturally produced by the Cannabis sativa L. plant.
  4. November 12, 2026. Section 781 takes effect (365 days after November 12, 2025), limited by section 2019 to that narrow class of cannabinoids.
  5. December 11, 2026. The section 2019 limit ends. The full section 781 definition applies, including total THC with THCA, the exclusion of cannabinoids synthesized or manufactured outside the plant, and the 0.4 mg per-container cap.

What section 781 changes

The 2018 definition looked only at delta-9 THC. Section 781 defines hemp as the Cannabis sativa L. plant and its derivatives with a total tetrahydrocannabinols concentration (including tetrahydrocannabinolic acid) of not more than 0.3 percent on a dry weight basis. It then lists exclusions. In plain terms, the following are not hemp under the new text:

  • Cannabinoids that are not capable of being naturally produced by the plant.
  • Cannabinoids that the plant can produce naturally but that were synthesized or manufactured outside the plant.
  • Intermediate hemp-derived cannabinoid products above 0.3% combined total of total THC and other cannabinoids with similar effects, and intermediate products marketed or sold as a final product or directly to an end consumer.
  • Final hemp-derived cannabinoid products with more than 0.4 milligrams combined total per container of total THC (including THCA) and other cannabinoids with similar effects, as determined by the Secretary of Health and Human Services.

The statute defines a “container” as the innermost wrapping, packaging, or vessel in direct contact with the final product, such as a jar, bottle, bag, box, packet, can, carton, or cartridge. For scale: a container holding 1 g of material at 20% total THC holds about 200 mg of total THC, and 0.4 mg is 0.0004 g. The THCA calculator runs both comparisons from a lab-report result and a container weight.

The “total THC” math

Raw flower can report a low delta-9 number while carrying a large amount of THCA, the acidic precursor that becomes delta-9 THC when heated (decarboxylation). A total THC calculation counts both:

total THC = delta-9 THC + (0.877 × THCA).

The 0.877 factor is the molar-mass ratio of THC (314.46) to THCA (358.47). USDA’s hemp production rule already uses this conversion for testing hemp as grown (7 CFR 990.1, “Total THC”), and so does Florida’s rule. Section 781 writes total THC, including THCA, into the federal statutory definition itself. For the chemistry, see what THCA is, and for the lab-report side, how to read a THCA COA.

Florida: FDACS Rule 5K-4.034

Florida regulates hemp for human consumption through the Florida Department of Agriculture and Consumer Services (FDACS). Rule 5K-4.034, subsection (2)(q), defines “total delta-9 tetrahydrocannabinol concentration” as delta-9 THC plus 0.877 times delta-9 THCA, and the rule sets a limit of 0.3% on that figure for hemp and hemp extract intended for human consumption. The version published by Cornell’s Legal Information Institute shows the rule as amended effective March 12, 2025. State rules apply alongside the federal definition, so read both. More on the state side: Is THCA legal in Florida?

What this article does not cover

It does not cover other states, tribal law, or how a particular product would be classified. It also does not predict whether Congress will move the dates again; section 2019 shows that it can.

Reading a lab report against these numbers

  1. Find the total THC line, not only the delta-9 number. If it is missing, add delta-9 THC and 0.877 times THCA.
  2. Compare it with 0.3% on a dry weight basis.
  3. Note the container’s net weight and multiply: total THC % × 10 mg per gram × grams gives the total mg to compare with 0.4 mg.
  4. Check the state rule where you live; it applies in addition to the federal definition.
  5. Check the date. Which part of section 781 applies depends on the product type and on whether November 12, 2026 or December 11, 2026 has passed.

Open the THCA calculator · Read the methodology · More guides

Sources

  1. Public Law 119-37 (H.R. 5371), division B, title VII, section 781 (signed Nov. 12, 2025). U.S. Government Publishing Office (govinfo).
  2. Public Law 119-103 (H.R. 6500), section 2019, “Section 781 extension” (signed Sept. 2, 2026). U.S. Government Publishing Office (govinfo).
  3. 7 U.S.C. § 1639o, definitions (current codified text, with the 2025 amendment note). Cornell Legal Information Institute.
  4. Florida Administrative Code Rule 5K-4.034, Hemp and Hemp Extract for Human Consumption, subsection (2)(q) (Florida Department of Agriculture and Consumer Services). Cornell Legal Information Institute.
  5. 7 CFR § 990.1, definition of “Total THC” (USDA domestic hemp production program). Cornell Legal Information Institute.
  6. Agriculture Improvement Act of 2018 (the 2018 Farm Bill), Public Law 115-334 (H.R. 2). U.S. Government Publishing Office (govinfo).
  7. USDA Agricultural Marketing Service — Hemp Production (rules & regulations).
  8. USDA Agricultural Marketing Service. "Establishment of a Domestic Hemp Production Program," Federal Register final rule (Jan. 19, 2021).
  9. Florida Department of Agriculture and Consumer Services (FDACS) — Hemp.