{"brand":"Compound Laws","url":"https://compoundlaws.com/compounds/thca/idaho/","compound":{"slug":"thca","name":"THCa","same_as":"https://en.wikipedia.org/wiki/Tetrahydrocannabinolic_acid"},"jurisdiction":{"code":"ID","name":"Idaho"},"as_of":"2026-10-22","answer":"As of October 22, 2026, THCa is illegal to sell at retail in Idaho. THCa flower illegal - scheduled / named ban. Listed as schedule 1, effective 2021-04-16. Controlling source: HOUSE BILL 126 (2021) - Signed by Governor April 16, 2021; Session Law Ch. 242; Effective 04/16/2021.","forms":[{"form":"all","label":"All forms","status":"illegal","state_status":null,"federal_overlay":false,"headline":"THCa flower illegal - scheduled / named ban","rule_type":"permanent","tier":"schedule_i","schedule_class":"schedule_1","limit":{"type":"total_ban","value":null,"unit":null},"effective_date":"2021-04-16","verified_at":"2026-10-22","confidence":"confirmed","verbatim_excerpt":"measured total delta-9 tetrahydrocannabinol concentration ... including both delta-9 tetrahydrocannabinol and delta-9 tetrahydrocannabinolic acid (THCA) evaluated by decarboxylation (Idaho Code 37-2701(u)(1))","excerpt_source_url":"https://legislature.idaho.gov/statutesrules/idstat/title37/t37ch27/sect37-2701/","citations":[{"title":"HOUSE BILL 126 (2021) - Signed by Governor April 16, 2021; Session Law Ch. 242; Effective 04/16/2021","url":"https://legislature.idaho.gov/sessioninfo/2021/legislation/H0126/","pinpoint":null,"publisher":"Idaho State Legislature, Legislative Services Office","type":"statute","primary":true,"official":true}],"history":[{"date":"2026-07-25","field":"effective_date","from":null,"to":"2021-04-16"}]}],"neighbors":[{"code":"MT","status":"illegal"},{"code":"NV","status":"illegal"},{"code":"OR","status":"illegal"},{"code":"UT","status":"illegal"},{"code":"WA","status":"legal"},{"code":"WY","status":"illegal"}],"laws":[{"citation":"Idaho Code 37-2701","title":"Definitions","official_url":"https://legislature.idaho.gov/statutesrules/idstat/title37/t37ch27/sect37-2701/","source_label":"OFFICIAL","effective_date":null,"retrieved_date":"2026-07-02","text_hash":"4e935c6f921f63663b0a2aae358e680a9ea5cc5c92b615234609303fe78453ca"},{"citation":"Idaho Code 37-2701 (marijuana definition, hemp exclusion), 37-2705; Idaho Code 22-1703","title":"Idaho Code 37-2701 (marijuana definition, hemp exclusion), 37-2705; Idaho Code 22-1703","official_url":"https://legislature.idaho.gov/statutesrules/idstat/title37/t37ch27/sect37-2701/","source_label":"OFFICIAL","effective_date":null,"retrieved_date":"2026-10-07","text_hash":"aaaf244fe54c131a25619411cbfba16b31b8d39687ba39508e9731a69ccb0874"},{"citation":"Idaho Code 37-2701(u)","title":"Definitions - Marijuana; Industrial Hemp exclusion and THC presumption clause","official_url":"https://legislature.idaho.gov/statutesrules/idstat/title37/t37ch27/sect37-2701/","source_label":"OFFICIAL","effective_date":null,"retrieved_date":"2026-07-18","text_hash":"cd7cb4bcca3264af4b3e8d8d47f840d2ac63b10670f40aaef53e9f15768058cd"},{"citation":"Idaho Code 37-2705(d)(29)","title":"Schedule I","official_url":"https://legislature.idaho.gov/statutesrules/idstat/title37/t37ch27/sect37-2705/","source_label":"OFFICIAL","effective_date":null,"retrieved_date":"2026-10-07","text_hash":"b19b8b8a61d2e2f457522f46825c8c629505bfbfdf8c8b04a7fcf84f2d02588f"}]}