Is THCA legal?

It depends on where you live, and anyone who answers in one word is selling something. Federally, hemp is defined by Δ9 THC at or under 0.3% dry weight, which is the reading THCA flower has sold under since 2018 — but many states test for total THC (THCA included), where the same jar is illegal cannabis. And the clock is running either way: a federal ban on intoxicating hemp products takes effect November 12, 2026. Check your state on our legality pages — each one cites the actual statute and carries a last-checked date.