Quick answer: With a state cultivation card, adults 21 and older in Missouri can grow up to 6 flowering plants, 6 nonflowering plants 14 inches or taller and 6 under 14 inches. No card means no legal home grow. Medical patients use a separate card, and everything must be in an enclosed, locked facility.

Last verified: October 30, 2026, against Missouri Constitution Article XIV, Section 2 and the Division of Cannabis Regulation. Laws change, so check the official site before you plant.

Who can actually register?

There isn’t just one card. 19 CSR 100-1.040 sets out three paths:

• Consumers: anyone at least 21 can apply for a consumer personal cultivation card. No medical card needed.
• Qualifying patients: licensed patients can add a patient cultivation card, except non-emancipated minors. That means a licensed adult patient under 21 can apply here. A parent or guardian who’s the primary caregiver can grow for a non-emancipated minor.
• Primary caregivers: a licensed caregiver can grow on a patient’s behalf, but only one person in a patient-caregiver relationship can hold that authority.

You can’t hold patient and consumer cultivation authority at the same time. An out-of-state medical card doesn’t work, because anyone growing in Missouri needs a Missouri cultivation card. And a consumer card only covers a private residence.

What the card costs

The fee schedule for July 1, 2026 through June 30, 2027 lists $115.68 for a consumer card and $57.83 for a patient or caregiver cultivation card. The cultivation page still says $100, but the constitution adjusts that fee each year for inflation.

The fee page says cultivation cards last three years, but the constitution, the rule and the state’s FAQ all say a consumer card lasts 12 months. Patient cards last as long as the patient’s ID, up to three years.

Consumers apply online with a name, address, Social Security number, grow address, a digital photo and a government photo ID.

How the limit works

Your limit is three separate buckets. Under Article XIV, Section 2.10, a registered grower can have 6 flowering plants, 6 nonflowering plants and 6 clones.

In a two-adult home where both hold consumer cards, you can have 12 flowering, 12 nonflowering at 14 inches or more, and 12 under 14 inches. Both must tell the state in their applications. The rule allows up to two consumer cardholders at a residence, with a 12/12/12 cap no matter how many consumers live there.

If only one of you holds a card, the limit is 6/6/6, and the space should be accessible only to people listed with the state. Two patients sharing a space also top out at 12 flowering. Caregivers growing for more than one patient top out at 24 flowering plants.

Where you can grow

An “enclosed, locked facility” is a stationary, fully enclosed, locked space with functioning security devices. Access is limited to the people who told the state it’s their grow space, and plants can’t be visible to the unaided eye from a public space.

A few more rules apply:

• Your card must be displayed inside the grow area, near the plants.
• Flowering plants must be labeled with your name.
• You can only grow in one location at a time.
• No growing at a place of business.

Renters, landlords and local rules

A card doesn’t beat a lease. Article XIV lets a property owner, or anyone who leases, occupies or manages property, prohibit cultivation there. The rule adds that nothing gives you a right to grow where state law or a private contract says otherwise. An HOA covenant may count as a private contract, so read yours first.

How much of your harvest can you keep?

There’s no weight cap for consumer growers in these rules, but there is a location rule. You can carry 3 ounces. Anything above that must stay in your enclosed, locked facility at a private residence. Licensed patient growers can hold up to a 90-day supply, as long as anything past a 60-day supply stays in the locked facility.

Can you give it away?

Consumers can deliver up to 3 ounces to another adult 21 or older for free. What a patient grows is for that patient’s exclusive use, so patient growers shouldn’t share it. Selling is out for everyone: the state warns that it can revoke your card, and marijuana sales are only allowed at licensed dispensaries.

Where do you get seeds or clones?

From a licensed dispensary, if yours carries them. Under 19 CSR 100-1.180, dispensaries can only sell plants acquired from licensed cultivation facilities, only to people currently authorized to grow, and only plants under 8 inches tall and wide. So bring your card. Availability varies, so call ahead.

What if you go over the limit?

• Plants visible from a public place: civil penalty up to $250, plus forfeiture.
• Plants not in a locked space: civil penalty up to $250, plus forfeiture.
• Up to double the allowed amount: up to $250 and forfeiture for a first violation, up to $500 for a second, then a misdemeanor with a fine of up to $1,000.
• Growing with no card: the constitution only protects registered growers. We didn’t find a set penalty, so assume general drug laws can apply.

And one plain reminder: home growing is still illegal under federal law, even where the state allows it. Recreational marijuana remains Schedule I, and the April 2026 move to Schedule III covers only state-licensed medical marijuana and FDA-approved products.

Missouri home grow FAQ

Do you have to be a medical patient to grow in Missouri?

No. Anyone 21 or older can apply for a consumer personal cultivation card. Medical patients use a separate patient cultivation card, and one person can’t hold both.

How much is a Missouri home grow card?

Missouri’s consumer personal cultivation card costs $115.68 from July 1, 2026 through June 30, 2027, and it lasts 12 months. A patient cultivation card costs $57.83.

Can two people grow at the same Missouri home?

Yes. Two consumers with valid cards can grow at one private residence if both told the state in their applications. The home is capped at 12 flowering plants, 12 nonflowering plants 14 inches or taller and 12 under 14 inches.

For the bigger picture, see our Missouri marijuana law guide and marijuana cultivation for beginners.

Setting up a legal grow? See our guides to the best grow lights and grow tents.