Short answer
No state can make cannabis cultivation legal under federal law. Cannabis sits on Schedule I of the Controlled Substances Act, so growing a plant breaks federal law no matter where you live. The workable answer comes from state law. Home cultivation is allowed in about 20 states for adults 21 and older, and in a smaller group of states for registered medical patients. In every case, plant counts, security rules, and local ordinances still apply.
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Before you plant
- A state ID, driver license, or medical cannabis card that proves you meet the age or patient rule.
- A private space with a lock that blocks access by anyone under 21.
- Your city and county rules on home cultivation, because some towns ban outdoor grows.
States where adults 21 and older can grow at home
These states permit recreational home cultivation. Plant limits range from 2 to 12 per household or per person, and several states require you to register the grow.
Cannabis Legal States for Medical Use: A Guide
- California, Colorado, Oregon, Alaska, Nevada, Arizona, Montana, New Mexico
- Missouri, Minnesota, Michigan, Ohio
- Virginia, Maryland, Delaware, Connecticut, Rhode Island, Vermont, Maine, Massachusetts
Nevada adds a distance rule: you can grow at home only if no licensed retail store sits within 25 miles of the residence. Vermont allows 2 mature plants and 4 immature plants. Maryland allows 2 plants. Minnesota allows up to 8. Michigan allows up to 12.
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States where only medical patients can grow
Some states permit cultivation for cardholders but not for recreational users.
- Washington: up to 6 plants with a medical authorization, and up to 15 with a waiver.
- Hawaii: up to 10 plants for registered patients who live on an island without a dispensary.
- Oklahoma: up to 6 mature plants and 6 seedlings for licensed patients.
- New York: medical patients may grow, and the state has been phasing in adult-use home grow rules.
Where growing cannabis remains illegal
- New Jersey, Illinois, Pennsylvania, Florida, Texas, Georgia, and every state with no home cultivation clause.
- All federal land: national parks, national forests, Bureau of Land Management land, and military bases.
- Public property, including sidewalks, parks, and community gardens.
- Private property where a lease, HOA covenant, or landlord rule bars cultivation.
Common limits in states that allow growing
- Plant caps, with separate counts for mature and immature plants.
- A locked, enclosed, or fenced area that blocks public view.
- Age 21 or older, or a valid medical card.
- No sales of homegrown flower without a state license.
- Possession limits on the finished product, measured in ounces.
- Residency rules in some states.
How to confirm the law in your state
- Open your state cannabis regulatory agency website and find the home cultivation section.
- Confirm whether the rule covers all adults 21 and older or only medical cardholders.
- Write down the plant limit and the mature versus immature plant definition.
- Check your city and county code for outdoor grow bans or odor rules.
- Read your lease, HOA covenant, or rental agreement for a cultivation clause.
- Confirm the address is not federal land or a federally subsidized housing unit.
- Keep your ID, medical card, and any registration receipt with your grow records.
Bottom line
Federal law bans cannabis cultivation across the country. Your state decides whether you can grow at home, and your city, landlord, and plant count decide how. Confirm all three before you start a seed.