The short answer for US growers: federal law permits zero, and the number that counts comes from your state. The most common recreational home grow cap in legal states is six plants per household, and that is the baseline to plan around. Four things move that number: your state statute, whether you hold a medical cannabis card, whether the limit counts only mature flowering plants or every plant with roots, and whether your city or county has passed a stricter local rule.
how to grow cannabis from seed
Six Plants Per Household: The Common Recreational Baseline
Six is the number that shows up most in recreational statutes, sometimes written as six per adult, sometimes as six per residence. Treat it as a starting ceiling, not a right.
How to Grow Cannabis in a Small Space: A Practical Guide
- Pros: simple to track, fits a small personal supply, and easy to explain to a landlord or roommate.
- Pros: a six plant tent fits most closets and can run on a single light and filter.
- Cons: the cap is per household in some states, so two adults in one apartment still share six plants.
- Cons: cities and counties can set a lower number or ban outdoor grows outright.
Use this baseline if you are a recreational grower in a legal state and have not yet read your own statute. Read it before you germinate.
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Medical Cannabis Plant Limits
Medical programs often allow more than the recreational cap. Some grant a fixed higher count, others tie the number to a doctor recommendation or to a patient and caregiver pair.
- Pros: higher plant counts, caregiver allowances, and in some states extra possession weight.
- Pros: patient status can add legal cover if a count is disputed.
- Cons: a card means fees, renewals, and a state registry entry.
- Cons: medical status does not travel across state lines, and it does not override federal law.
Grow under medical rules if you have a qualifying condition and your state medical cap is higher than the recreational one. Get the medical cap in writing from the licensing agency, not from a forum post.
Mature vs Immature Plants: Where Counts Go Wrong
Many states count only mature or flowering plants. Others set two numbers, such as six mature and six immature. Some count every plant with a root, including clones and mother plants.
- Pros of a mature only rule: staggered harvests, mother plants, and clones do not eat your flower count.
- Cons: mature is defined differently from state to state, and a vegging plant can count as mature once it hits a size or light cycle threshold.
- Cons: an unlabeled tent makes it hard to prove which plants are immature.
Track every plant with a dated log and separate stages into labeled zones. If your state counts mature plants only, that log is your defense.
Per Person or Per Household
The wording of the statute decides who gets to grow. Per adult lets roommates each run a garden. Per household or per residence means one shared cap no matter how many adults live there.
- Pros of a per person cap: shared rent, shared grow space, more total plants.
- Cons of a per household cap: roommates must agree on who grows and how many plants each tent holds.
- Cons: a second tent in the same apartment can push a household over the limit even if no single person is over.
If your state uses a household cap, name one grower of record and keep a written count. That keeps a shared apartment from looking like an unlicensed grow.
Legal States With No Recreational Home Grow
Not every legal state allows home cultivation. A few permit medical grows only, and a few allow none at all for adults.
- Pros of knowing: you avoid plant seizure, fines, and a charge that can follow you for years.
- Cons: no legal home grow means no home grow, regardless of how small your setup is.
If your state bans it, buy from a licensed retailer and keep the receipt. That is the path with the least risk.
City Rules, Landlords, and HOAs
State law sets the outer limit. Cities, counties, landlords, and HOA boards can set a tighter one. Common local rules include lower plant counts, bans on outdoor grows, locked enclosure requirements, and limits on visibility from public view.
- Pros of checking early: your lease and your city code both matter, and a five minute call can save a grow.
- Cons: local rules change, and a rule that was fine last year may not be fine now.
- Cons: a landlord can ban growing in a lease even where state law allows it.
Call the city planning or code office, read your lease, and review HOA covenants before you buy seeds or clones.
How to Confirm Your Legal Number
- Read your state statute or the state cannabis agency page on home cultivation.
- Note whether the cap is per person or per household, and whether mature and immature plants are counted apart.
- Check medical program rules if you hold a card or plan to apply.
- Check city and county ordinances for lower counts or outdoor restrictions.
- Read your lease, HOA rules, and renters insurance policy.
- Keep a dated log of plant counts and growth stages with your ID or patient card.
- Recheck the law each year. Plant caps are amended by legislatures and by ballot measure.
Plant counts are a moving target, and the safe number is the lowest one that applies to you. When the state cap, the city rule, and your lease disagree, follow the strictest one.