Congress closes the 2018 Farm Bill hemp loophole, capping hemp products at 0.4 mg total THC per container

On November 12, 2025, Congress enacted the most sweeping federal overhaul of hemp law since 2018. Attached to the FY2026 Agriculture/FDA appropriations package that ended the autumn 2025 government funding standoff, the provision rewrote the 2018 Farm Bill’s definition of legal hemp—targeting the multi-billion-dollar market for unregulated intoxicating hemp gummies, beverages, THCA flower, and delta-8 vapes sold outside state-licensed cannabis dispensaries.

What the November 2025 federal hemp provision changed

• Total THC (including THCA) instead of delta-9 only: Whereas the 2018 Farm Bill measured only delta-9 THC on a dry-weight basis, the updated federal standard measures total THC—explicitly counting tetrahydrocannabinolic acid (THCA) and other tetrahydrocannabinol isomers toward the 0.3% dry-weight limit.
• Ban on synthesized or chemically converted cannabinoids: The statute excludes cannabinoids produced through chemical synthesis or isomerization outside the natural plant—such as delta-8 THC, delta-10 THC, and HHC converted in labs from hemp-derived CBD isolate.
• The 0.4 mg per-container cap: Most consequentially for consumer packaged goods, any finished consumable hemp product may contain no more than 0.4 milligrams of total THC per package or container—effectively prohibiting intoxicating hemp gummies and THC seltzers from interstate general retail unless moved into regulated channels.

The one-year transition window (extended to December 11, 2026)

To prevent immediate supply-chain disruption, Congress included a one-year implementation runway originally scheduled to take effect on November 12, 2026—later extended by four weeks to December 11, 2026 under a subsequent continuing resolution (H.R. 6500)—while lawmakers debated competing proposals such as the Hemp Planting Predictability Act (seeking a two-year delay to 2028) and bipartisan bills to regulate rather than ban low-dose hemp beverages.