There is no single national number. How many plants can you grow in my state is set by state law, and it depends on three things: whether home cultivation is legal where you live, whether you grow as a medical patient or an adult-use consumer, and whether the limit counts plants per person or per household. States that permit home grow commonly land between 4 and 12 plants per household, and a few states allow none at all.
Understanding the Penalties for Exceeding Plant Count in Cannabis Growing
Why the number changes from state to state
Cannabis remains a controlled substance under federal law, so there is no federal cultivation allowance to fall back on. Each state that legalized cannabis wrote its own home grow section, and those sections reflect local politics, timing, and whether the state wanted home growing at all. Some states with legal retail sales still bar recreational home cultivation. Others set a fixed household number. A few let registered medical patients grow more than recreational users, or let patients grow in states where recreational growing is prohibited.
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Typical home grow limits, in plain terms
Exact numbers change with each legislative session, so treat these as patterns rather than permanent rules. Confirm your own state before you plant.
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- Zero plants: Several states with legal cannabis sales prohibit home cultivation unless you hold a medical authorization.
- 4 plants: Oregon caps recreational home grow at four plants per household.
- 6 plants: California allows up to six plants per private residence, and several other states use six as a per-adult number.
- 12 plants: Michigan and Massachusetts use a 12-plant household ceiling, and other states reach 12 when two adults each count six.
- Medical exceptions: A few states tie higher or exclusive grow rights to registered patients.
Per person or per household
This distinction settles more questions than any other. A rule written as six plants per adult with a 12-plant household maximum means two adults can grow 12 total, not 12 each. A rule written as six plants per residence means six no matter how many adults live there. Read the wording of the statute instead of relying on a summary, because a single word changes your legal ceiling.
Mature versus immature plants
Many states count flowering or mature plants separately from seedlings and vegetative plants. That means a tray of clones may sit outside the number, while the plants in flower use up your allowance. Mother plants kept for cuttings sometimes count as mature. If an inspector or officer asks, the category your plants fall into on that day is what matters.
Other rules that cap your grow
The plant count is rarely the only limit. Common companion rules include:
- A possession cap on harvested flower, usually measured in ounces per household.
- A requirement that plants be in a locked, enclosed space and not visible from public view.
- Restrictions on outdoor growing, or on growing in a residence used by children.
- Distance buffers from schools, parks, or childcare centers in some states.
- Local zoning, landlord permission, and HOA rules, which can be stricter than state law.
- A flat ban on selling anything you grow. Home grow is personal use.
How to check your state's exact number
- Find your state cannabis regulatory agency or department of health and look for the home cultivation page.
- Read the statute section it cites, not a blog summary of it.
- Note whether the cap is per person or per household and whether it counts only mature plants.
- Check your city and county code for stricter local limits.
- If you rent, check the lease before you buy a tent or a light.
When home grow is not an option
If your state allows no home cultivation, or your lease does, the legal path to cannabis runs through licensed retail. Knowing your state's plant rule is still useful: it tells you how much of the market is supplied by home growers, what possession limits apply when you walk out of a store, and why product availability differs from one state line to the next.