Federal Hemp Ban Phase One Took Effect Nov. 12. The 0.4 mg THC Cap That Hits Most Products Is Set for Dec. 11

Since Congress rewrote the federal definition of hemp in a spending bill signed Nov. 12, 2025, the industry has been counting down to two deadlines. The first passed on Thursday, Nov. 12. The second is Dec. 11.

What changed Thursday

Phase one removed federal hemp status from cannabinoids that the cannabis plant cannot naturally produce. Products containing them are now treated as marijuana under the Controlled Substances Act. The change covers both intermediate and finished products. THC-O is the standard example.

A September stopgap spending bill, Public Law 119-103, pushed the rest of the ban from Nov. 12 to Dec. 11. Synthetic cannabinoids were carved out of that delay.

The line between natural and synthetic is blurry. The original law told the FDA to publish a list of cannabinoids the plant can naturally produce within 90 days. As of Sept. 28, the Congressional Research Service reported that no such list had been published.

HHC shows the problem. Studies in Current Neuropharmacology (2023) and Scientific Reports (2024) found it occurs in trace amounts in the plant, so some argue it should not fall under phase one. Marijuana Moment reported disagreement over which products on shelves are actually affected.

Phase one also does not reach conversions of cannabinoids the plant can make, such as turning CBD into delta-8 or delta-9 THC. That is phase two.

What lands Dec. 11

The second phase measures hemp by total THC, including THCA. It excludes cannabinoids converted outside the plant, which covers most delta-8. It caps finished products at 0.4 milligrams of total THC per container.

A single 5-milligram gummy is more than 12 times that limit. The U.S. Hemp Roundtable estimates roughly 95% of hemp-derived products sold today would become federally illegal.

State-licensed marijuana dispensaries are not covered. The 2018 Farm Bill, signed by President Trump, legalized hemp at 0.3% delta-9 THC by dry weight. Critics, including Sen. Mitch McConnell and parents worried about children buying gas station products, say the market that grew from it had no testing, labeling or childproofing rules.

The case for closing the loophole

Cory Harris, who lobbies for state-licensed dispensaries, calls the hemp market a "wild west" with products far more potent than anything in a dispensary and no real testing or packaging standards. He ties a documented rise in THC-related pediatric emergency room visits to easy access. He also says unregulated hemp undercuts heavily taxed dispensaries in 41 states and Washington, D.C.

Josh Glasstetter of the American Trade Association for Cannabis and Hemp said "virtually nothing changes" Thursday. He said the intoxicating hemp market "will remain the same for one more month."

Industry wants regulation, not prohibition

Jonathan Miller, general counsel for the U.S. Hemp Roundtable, said the industry supports banning synthetic cannabinoids. He is pushing Congress to pass a plan to "robustly regulate" hemp products instead of what he called an "ill advised complete ban."

Marijuana Moment reports that industry advocates and a bipartisan group of lawmakers, working with the Trump administration, are pushing legislation for that alternative. No bill has cleared Congress.

The ban itself rode in on a must-pass budget bill. In Florida, Republican Gov. Ron DeSantis vetoed a 2024 bill to rein in intoxicating hemp, citing the burden on small businesses. Congress then did it nationally.

Small businesses are already adjusting

Some states did not wait. Missouri scheduled its own ban for Thursday. Melissa Eigenmann, owner of Prohibition Cannabis in Kansas City, told NPR member station KCUR she had to let all her employees go and close. She said she cannot afford a $5,000 fine and now faces fines for selling what had been fully legal the day before.

Florida's hemp statute has not changed, but federal law applies there. Tampa criminal defense attorney Rocky Brancato notes that a roadside field test cannot distinguish legal hemp from illegal marijuana, so cases will turn on lab reports.

In Tampa, Tom Mueller of Affluent Wellness and Vapor Lounge says hemp THC gummies are among his bestsellers. Smoke shop owners told Reason hemp makes up about 20% of their revenue. Michael Smith told Florida Phoenix that about 80% of sales at his two Herban Flow stores in St. Petersburg come from hemp THC products.

Treadwell Farms in Umatilla had sold to six farmers by midyear, against about 20 in a normal year. "Farmers are not putting plants in this season," owner Jammie Treadwell said.

Carlos Hermida, owner of Chillum Mushroom and Hemp Dispensary in Ybor City, signed a two-year DoorDash delivery contract and is trying to move inventory before Dec. 11. Anything left on the shelf Dec. 12 is illegal to sell, and he says he would have to destroy it. He also says the shop is cash-only until a new register arrives.

Several Florida owners told Reason they would not go on the record out of fear of inspector retaliation.

What to watch

The open question is whether Congress passes a regulatory framework before Dec. 11. CNN reports another extension of the deadline is not out of the question, but none has been announced. Without one, the 0.4 mg cap takes effect across the country on that date.