Cannabis laws · Verified July 2026

Is cannabis legal in Missouri?

Recreational & medical

Yes. Cannabis is legal for adults 21 and over in Missouri, for both recreational and medical use.

Adult-use legal since Dec 8, 2022 (Amendment 3), layered on the 2018 Amendment 2 medical program; retail sales operating statewide.

What this status means: Recreational (adult-use) status means adults at or above the legal age may possess cannabis within state limits without a medical card, and a licensed retail market is authorized. State rules still control amounts, home cultivation, and where use is allowed, and it stays illegal to cross state lines with cannabis.

The facts, with sources

Possession: Adults 21+: up to 3 oz (85 g). Patients: possess up to 60-day supply (12 oz); purchase 6 oz per 30 days, more if certified; cultivators up to 90-day supply.
Decriminalized: Yes
Home cultivation: Yes Requires a paid state cultivation registration card (~$100/yr); not automatic. Up to 6 flowering + 6 nonflowering mature + 6 clones per registrant; max 12 flowering per household; enclosed, locked, not publicly visible.
Medical reciprocity: Varies Const. Art. XIV §1 shields holders of an equivalent out-of-state card from arrest for possession within MO limits; dispensaries MAY accept out-of-state cards from equivalent states (19 CSR 100-1.180). Moot given adult-use sales to all 21+.

Sources

Missouri Constitution of 1945, Article XIV (Section 1 medical / Section 2 Amendment 3 adult-use) (opens in new tab) primary accessed 2026-07-03
Missouri DHSS, Division of Cannabis Regulation: General FAQs (patient 60-day supply and 30-day purchase limits) (opens in new tab) primary accessed 2026-07-30
Missouri Code of State Regulations, 19 CSR 100-1 (§100-1.180 out-of-state patient cards) (opens in new tab) primary accessed 2026-07-03
Missouri DHSS, Division of Cannabis Regulation: Adult Use FAQs (3 oz possession limit for 21+, consumer personal cultivation card) (opens in new tab) primary accessed 2026-07-30

Verified July 3, 2026

How federal law applies

Cannabis (termed "marijuana" in federal law) generally remains a Schedule I controlled substance. Only FDA-approved products and cannabis held under a qualifying state medical license have been moved to Schedule III (rule effective April 28, 2026); the broader Schedule I-to-III transfer is not finalized and remains pending in DEA's expedited rescheduling rulemaking.

Under the December 18, 2025 Executive Order on "Increasing Medical Marijuana and Cannabidiol Research," DOJ/DEA announced on April 23, 2026 that it was placing FDA-approved cannabis products and state-licensed medical cannabis into Schedule III (rule effective April 28, 2026) but left all other cannabis (unlicensed adult-use, bulk material, and synthetic THC) in Schedule I, and opened an expedited rulemaking (Federal Register, April 28, 2026) to consider rescheduling more broadly. A DEA administrative law judge began hearing evidence in that rulemaking on June 29, 2026; as of this site's last verification of this section, no final rule rescheduling cannabis generally had been issued. State-legal cannabis programs are unchanged by these developments and continue to operate under their own state laws.

A note on terminology: federal statute uses "marijuana" (spelled "marihuana" in the Controlled Substances Act) for what scientific and healthcare literature calls cannabis. This site uses "cannabis" except when quoting official sources.

Federal section verified July 30, 2026 · sources on the map page

Bordering states

See Missouri on the interactive map, or compare all 50 states and DC.

This information is for educational purposes only and is not legal advice. Cannabis laws change frequently and details (limits, licensing, local rules) vary within states. Always confirm against the linked primary sources or a licensed attorney in your state.

Methodology, sources & AI use

Each jurisdiction was researched against at least two sources: the controlling state statute or state agency page, cross-checked against an aggregate policy tracker. Every state was then independently re-derived in a second, blind research pass, and every disagreement and every nuanced case (low-THC programs, varies flags, recent law changes, DC) was resolved by a third review against primary sources. Access dates are recorded per source and a verification date is shown per state. US territories are not yet covered.

The underlying dataset is available as JSON under a CC BY 4.0 license (opens in new tab); reuse it with attribution and a link back.

How AI was used: This dataset and page were built with substantial help from AI (Anthropic's Claude), directed and reviewed by a human editor. AI research agents gathered the statutes and agency pages cited for each state; a second, independent AI pass re-derived every state's facts without seeing the first pass; and a third pass resolved all disagreements against primary sources. Every cited link was then opened and checked in a real web browser, and dead or outdated citations were corrected by hand before publication. AI can still make mistakes, and laws change quickly.

Spotted an error? Reach out via the contact page and it will be checked against the primary sources and corrected.

Dataset updated July 2026.