The short answer
There is no national plant number. Cannabis is still illegal to grow under federal law, so every legal plant count you have ever read comes from a state statute. Your state sets the number, your county and city can tighten it, and your lease can take it to zero. In practice the range across legal states runs from no recreational home grow at all (Washington) to 12 plants per adult with a 24-plant household cap (Michigan).
Three layers stack on top of each other
- State statute. This is where the number lives: a specific count, a household cap, or both.
- Local ordinance. Cities and counties can ban outdoor cultivation, require a locked enclosure, or cap plants below the state limit.
- Federal law. The Controlled Substances Act still lists cannabis as Schedule I, which means no state number protects you from federal charges in theory, only in practice.
Plant counts people cite most in 2025
Read these as starting points. Statutes get amended and state agencies publish guidance that moves the practical line.
what happens if you exceed cannabis plant limit
- California: 6 plants per private residence, not per person. Adults 21 and over. Local bans on outdoor grows are common, and the legal possession cap (28.5 grams) can be smaller than what six plants produce.
- Colorado: 6 plants per adult, 12 per household, with only 3 mature flowering plants per adult. Counts above that can be charged as a felony in some circumstances.
- Michigan: 12 plants per adult, 24 per household for personal use.
- Massachusetts: 6 per adult, 12 per household, and they must be in a locked space not visible from the street.
- Oregon: 4 plants per household regardless of how many adults live there.
- Nevada: 6 per adult, 12 per household, inside a locked enclosure or a secured outdoor area.
- Alaska: 6 plants total, only 3 of them flowering.
- Washington: No recreational home grow. Medical patients with a valid authorization can grow a limited number.
Three details that quietly change your legal count
1. Per person or per household
These are not the same law. Oregon and California key off the residence. Michigan, Colorado and Massachusetts multiply by adults, then stop at a household ceiling. If four adults share a house in Michigan, they do not each get 12.
2. Mature versus immature plants
Several states distinguish flowering plants from vegetative ones and from seedlings. A seedling in a red cup may not count toward the flowering limit, or it may count toward the total. This is the single most misunderstood part of home grow law.
States With Unlimited Cannabis Plant Count: What the Law Actually Allows
3. Medical versus recreational
Registered patients often get higher caps, and caregivers can sometimes grow for multiple patients, which is a completely different regulatory track with its own paperwork and plant tags.
The federal layer is not going anywhere
A proposal to move cannabis to Schedule III was still working through the DEA process as of early 2025. Even if it finalizes, rescheduling changes tax treatment and research access. It does not legalize a single plant in your garage. Federal charges for a personal grow are rare, but they are not zero, and they climb fast with plant count, shipping, and any hint of sales.
What actually changed for 2025
Not much at the top. A handful of states adjusted possession thresholds and medical access, and the rescheduling fight kept sliding. If your source is a blog post from 2021, you are guessing about your own legal exposure.
How to verify your number in about ten minutes
- Search your state legislature site for the cultivation section of the cannabis statute, not a summary of it.
- Pull up your state cannabis agency page and look for home cultivation guidance or FAQ.
- Search your city or county code for the words cultivation and home grow.
- Read your lease or HOA rules. These are private contracts, not law, but they can end a grow just as fast.
The convenience angle
Most people ask about plant numbers because they want a few plants instead of a dispensary run. That math works right up to the cap. One extra tray can turn a legal hobby into a charge, and in per-plant states the difference between a citation and something more serious is often a single number written into a statute you have never read.