MISSOURI

Automatic expungement deadline

Courts work toward Amendment 3’s mandate to automatically review and expunge eligible nonviolent cannabis convictions. More than 140,000 records are ultimately cleared — among the most comprehensive expungement provisions written directly into a legalization measure.

Adult-use retail sales begin

Existing medical dispensaries begin adult-use sales just 87 days after the vote — one of the fastest voter-approval-to-retail transitions in the country. DHSS issued licenses a day earlier than its announced February 6 date.

Possession legal; Amendment 3 takes effect

Adults 21+ may possess up to three ounces and home-cultivate with a registration card. Because legalization is enshrined in the state constitution, the legislature cannot amend or repeal it — only another voter amendment can.

Voters approve Amendment 3

Missouri voters legalize adult-use cannabis 53% to 47% via constitutional amendment, also creating an equity-focused microbusiness license category and a 6% retail excise tax.

Medical cannabis sales begin

Missouri’s first licensed medical cannabis sales launch, building the dispensary and cultivation infrastructure later converted to adult-use.

Voters approve medical cannabis (Amendment 2)

Missouri voters approve Amendment 2 with about 66% support, establishing a constitutional medical cannabis program under the Department of Health and Senior Services.