Possession and use
Adults 21 and over may possess up to three ounces of dried cannabis or its equivalent. The department's 2026 visitor guide expresses equivalents as 24 grams of concentrate or 800 milligrams THC in infused products. Public use and impaired driving are prohibited.
Medical access
A Missouri patient ID permits a standard six-ounce purchase allotment per 30 days, with a higher amount possible on clinician certification. DHSS says licensed dispensaries may accept an out-of-state medical card, but a visitor should confirm the facility's procedure and applicable medical limits before buying.
The six-ounce standard is a thirty-day purchase allotment, not the full amount every patient may carry. DHSS says a patient without cultivation may possess a sixty-day supply, normally twelve ounces, while an authorized cultivator may hold a ninety-day supply if the extra amount is locked. Clinician authorization may modify the baseline.
Home cultivation
A cultivation card is required. Each authorized consumer or patient may grow six flowering plants, six nonflowering plants at least fourteen inches tall and six below fourteen inches. Consumer residence totals are twelve in each category. Two authorized patients sharing a locked facility have the same totals. Multi-patient caregivers have a separate ceiling of twenty-four in each category; the authorization and patient assignments control. Only one person may cultivate for a given patient. Consumer and caregiver plants cannot share a facility. Plants must be secured and concealed from public view.
Buying legally
Legal sales occur only at DHSS-licensed dispensaries. Adults need valid government photo ID; an adult-use transaction may include up to three ounces or its equivalent. Medical cardholders should identify the transaction as medical to receive the proper allotment and tax treatment.
Taxes
DHSS lists a 6% state adult-use marijuana tax, plus ordinary applicable taxes and a possible local marijuana tax up to 3%. Medical marijuana carries a 4% program tax plus otherwise applicable sales taxes. This makes patient and adult-use checkout totals materially different.
DHSS says the medical four-percent and adult six-percent marijuana taxes are levied in addition to ordinary sales and use taxes. A local government may impose an additional adult-use marijuana tax of up to three percent. Therefore the final receipt varies by whether the sale was medical or adult use and by location.
Travel and transport
The 2026 DHSS visitor sheet says cannabis purchased in Missouri must stay in Missouri. A visiting medical card may allow a Missouri dispensary transaction, but does not make border crossing lawful. Do not fly or drive across state lines with marijuana.
Sources and remaining checks
We checked the sources below on the date shown above. Rules may have changed since then. Check the current rules before making a decision, and read the remaining questions noted in this guide.
- Missouri DHSS general cannabis FAQs. Adult and medical allotments, out-of-state card acceptance, taxes.
- Missouri DHSS adult-use FAQs. Possession and cultivation details.
- Missouri DHSS visitor guide. 2026 visitor guidance and interstate warning.
- Missouri DHSS patient, caregiver and consumer cultivation. Directly read October 23, 2026; category counts, shared patient facilities, caregiver limits and separation conditions.
No professional legal review is claimed. Check official sources and the verification notes below.