Legal Cannabis Plant Limit: The Short Answer
No federal law sets a number of cannabis plants you may grow at home. Cannabis remains a Schedule I controlled substance under federal law, so your plant count comes from your state. Some states allow zero plants. Others allow 6, 12, or more per household. A few allow medical patients to exceed the standard recreational count with a doctor's recommendation.
Hemp is a separate category. The 2018 Farm Bill legalized hemp, defined as cannabis with a delta-9 THC concentration of 0.3 percent or less on a dry weight basis. Hemp cultivation still requires a license through a USDA-approved state, tribal, or federal plan. A home hemp grow is not covered by a casual plant limit.
Why Plant Limits Differ by State
States that legalized cannabis for adult use wrote their own home cultivation rules. Those rules cover:
Cannabis Plant Growing Limits: What You Need to Know
- Number of plants per person
- Number of plants per household or residence
- Mature versus immature plant counts
- Whether medical patients can grow more
- Visibility, security, and lockup requirements
Colorado permits up to six plants per adult 21 and older and caps a single residence at 12 plants. Virginia allows four plants per household. Washington does not permit recreational home grows at all. Michigan allows 12 plants per household. Your state law, not a national rule, controls your answer.
Prerequisites Before You Plant
- You are at least 21 years old, or 18 or older with a valid medical cannabis card where allowed.
- You live in a state that permits home cultivation for your status (recreational or medical).
- You own the property or have written permission from the owner.
- You can meet your state's security, tagging, and labeling rules.
How to Confirm Your Legal Plant Limit
- Search your state legislature's website for the home cultivation statute in the state cannabis code.
- Read the definitions section to see whether the limit counts mature plants, flowering plants, or all plants.
- Find the per-person and per-household caps and note which one controls when they conflict.
- Check whether your state adds a separate medical cultivation allowance for registered patients.
- Confirm the rules for your city or county, since some municipalities ban home grows or add stricter limits.
- Write down the confirmed plant number.
- Keep a copy of the statute or program rule with your grow records.
Medical Plant Limits and CBD Products
Medical cannabis programs can allow a higher plant count. A registered patient may grow 12 plants in a state that gives recreational users 6. Caregivers may also grow for patients, and some states issue an extended plant count for patients who need more. CBD products sold in stores are made from hemp, not from home-grown cannabis plants, so a hemp-derived CBD purchase does not add to or subtract from your state's plant limit.
What Happens If You Exceed the Limit
Over-limit cultivation can bring civil fines, criminal charges, or both, depending on the state and the number of extra plants. One plant over a 6-plant cap may be a civil violation in one state and a misdemeanor in another. States also enforce plant limits by plant weight and by total yield at harvest. If you are unsure, grow fewer plants than the cap until you confirm the rule in writing.