Overview
Possession limits exist to define how much cannabis a patient can legally carry or keep at home without it counting as distribution-level quantity. States that use a "days of supply" model give more flexibility, since the exact amount can be tailored to your physician's recommendation. States that use a flat weight limit are simpler to understand but less flexible for patients who need more.
Possession limits, state by state
| State | Possession / purchase limit |
|---|---|
| Florida | 70-day supply; smokable flower capped at 2.5 oz per 35-day period |
| California | 8 oz dried flower (physician may authorize more) |
| New York | Greater of a 60-day supply or 3 oz flower + 24g concentrate |
| Pennsylvania | 90-day supply, amount set by your certifying physician |
| New Jersey | 3 oz per 30-day period (no limit for terminal illness patients) |
| Arizona | 2.5 oz per 14 days |
| Michigan | 2.5 oz usable flower, plus what's produced from your allowed plants |
| Ohio | 90-day supply, dispensed in two 45-day increments |
| Illinois | 2.5 oz per 14 days (up to 5 oz with a physician waiver) |
| Massachusetts | 60-day supply, presumptively about 10 oz |
| Maryland | 120g (about 4 oz) flower per 30 days, plus 36g of concentrate |
| Missouri | 6 oz per 30-day period (up to 8 oz at your residence) |
| Oklahoma | 3 oz on your person, plus up to 8 oz at your residence |
Check your state's guide for the exact statute and any product-specific sub-limits (like concentrate or edible caps).
Days-of-supply vs. flat weight
Pennsylvania, Ohio, Florida, New York, and Massachusetts all use a supply-period model, which ties your allowance to your physician's recommendation rather than a single hard number. Arizona, Michigan, Illinois, New Jersey, Maryland, Missouri, and Oklahoma use flat weight limits instead, which are easier to calculate but don't flex based on your specific treatment needs.
Key takeaways
- Possession limits range from about 2.5 oz every 14 days (Arizona, Illinois) to a 90-day supply (Pennsylvania, Ohio).
- Some states use a "days of supply" model tied to your physician's recommendation; others use a flat weight.
- Several states set separate, usually lower, limits for concentrates.
- Purchase limits (how much you can buy in one visit) can be stricter than total possession limits.
- Always confirm the current limit with your state's medical marijuana program before a large purchase.
Common questions
Which state has the most generous possession limit? +
Pennsylvania and Ohio both allow up to a 90-day supply, the longest supply window of the 13 states we cover, though the exact amount is set by your physician rather than a fixed weight.
What happens if I exceed my state's possession limit? +
Exceeding your legal limit can put you outside your medical marijuana program's protections, potentially exposing you to the same penalties as unauthorized possession. Always confirm your state's current limit and stay within it.
Are concentrate limits different from flower limits? +
Yes, in several states. New York and Maryland, for example, both set a separate gram limit for concentrates on top of their flower allowance.
Educational content only — not medical or legal advice. Possession limits change; always verify the current amount with your state's medical marijuana program.