There is no single national number for personal-use cannabis. Limits are set state by state, and what you can legally hold depends on three things: your state, the form of the product, and whether you are in public or at home. In states with legal adult use, the typical public possession range is 1 to 3 ounces of flower, with concentrates and edibles capped separately. Home storage limits usually run higher than public ones, and home grow limits higher still. A few states go much further, like Minnesota, which allows up to 2 pounds in the home.
how much weed can you legally carry
Why convenience keeps shaping these numbers
Most people never read a possession statute. They read a menu. A shop caps a single transaction at 1 ounce, so 1 ounce becomes the number in their head, and it stays there. Delivery makes the gap wider. When the whole order shows up at your door in one bag, the difference between what is easy to buy and what is legal to keep stops being obvious.
personal use cannabis amount laws
Then there is the form problem. Somebody buys a three-pack of live resin vapes and assumes grams are grams. In most states, concentrate converts to flower on a fixed equivalency scale, usually around 3 to 4 grams of flower per gram of concentrate. That carton of vapes can count as more cannabis than the flower jar sitting next to it.
cannabis possession limits for minors
The three numbers people mix up
- Purchase limit: how much a licensed retailer can sell you in one transaction.
- Possession limit: how much you may legally carry in public.
- Home limit: how much you may store at your residence, plus any plant count.
These are rarely the same figure. Colorado is the clean example. Retail sales are capped at 1 ounce per transaction, adult possession runs to 2 ounces, and a household can grow up to 12 plants. Buy 1 ounce, drive home, and you are fine. Buy 1 ounce, drive home, and add it to the 2 ounces already in the drawer, and you are not.
Cannabis Possession Limits in California
Rough ranges by state
Numbers below are for adults 21 and older and reflect the general shape of each state's rules. Legislatures adjust these often, so treat them as a starting point rather than gospel.
- California: 28.5 grams of flower and 8 grams of concentrate in public, plus up to 6 plants at home, subject to local rules.
- Colorado: 2 ounces of possession, 1 ounce per retail transaction, 6 plants per adult up to 12 per household.
- Washington: 1 ounce of flower, 7 grams of concentrate, 16 ounces of solid edibles, 72 ounces of liquid edibles. No home grow for recreational adults.
- Oregon: 1 ounce in public, 8 ounces at home, 4 plants.
- Illinois: 30 grams of flower for residents, 15 for visitors, with smaller caps for concentrate and edibles.
- Michigan: 2.5 ounces in public, 10 ounces at home, up to 12 plants.
- New York: 3 ounces of flower and 24 grams of concentrate, with home grow up to 6 plants per adult and 12 per household.
- Ohio: 2.5 ounces, 6 plants per adult up to 12 per household.
- Massachusetts: 1 ounce in public, 10 ounces at home, 6 plants per adult up to 12 per household.
Form matters as much as weight
Some states count flower, concentrate, and edibles as separate categories with separate caps. Others roll everything into a single equivalency chart. That difference decides whether your vape cartridge eats into your flower allowance. If you use mostly concentrate or edibles, read the equivalency section of your state's rules first. It is usually buried under the retail section, not the possession section.
Home grow is where the numbers jump
Plant counts are the most generous part of most legal frameworks, and the easiest to get wrong. Many states set a per-person plant cap and a lower per-household cap. Six plants per adult sounds like 24 plants in a four-adult house. It usually is not. Common household ceilings land at 12. A few states, like Washington, do not permit recreational home grow at all, even though neighboring Oregon does.
How I would check my own state
- Find the state cannabis regulator, not a dispensary blog. Regulators publish the actual possession language.
- Read the possession section, then the retail transaction section. They are different rules with different numbers.
- Check city and county ordinances. Local bans and lower caps sit on top of state law.
- Look for an equivalency chart if you buy concentrate or edibles.
- Confirm whether the state aggregates forms or counts them separately.
- Remember the federal layer. State lines, airports, and national parks are governed by federal law regardless of what your state allows.
Where convenience stops being a defense
The convenience economy, curbside pickup, delivery, drive-through windows in a handful of states, has quietly trained people to stock up. That habit collides with possession caps in a predictable way. A public possession limit applies the moment you step outside with the bag, and several states treat an unsealed container in a vehicle as a separate issue from how much is inside it.
Hemp-derived products add another wrinkle. Gummies sold at gas stations sit in a different legal category defined by dry-weight THC content, and a growing number of states have moved to close that gap. If you are counting milligrams of a hemp product against your state's cannabis limit, you are probably counting wrong.
The short version: know your public cap, know your home cap, know how your state converts concentrate and edibles, and do not let a convenient one-stop order talk you into holding more than the law allows.