Weed Possession Limits in California: What Adults Can Carry

The number to remember in California is 28.5 grams of cannabis flower, or about one ounce, plus 8 grams of concentrated cannabis. That is the maximum an adult 21 or older may possess, carry, or transport in public under Health and Safety Code section 11362.1, and it applies whether the cannabis was bought from a licensed retailer or grown at home. The limit changes for medical patients, for concentrates, and for home cultivation, so this guide breaks down the four things that actually determine your allowance: your age and patient status, the product form, the place where you are standing, and any stricter city or county ordinance.

Cannabis Possession Ticket Cost: Fines and Fees

The baseline limit for adults 21 and older

State law sets a single public possession cap for recreational users. It covers flower, shake, pre-rolls, and any packaged cannabis product measured in grams of plant material. You do not need a card, a receipt, or a reason to carry up to that amount, and a police officer cannot require you to prove where you bought it.

cannabis possession without intent to distribute

28.5 grams of cannabis flower or plant material in public
8 grams of concentrated cannabis in public
Up to six living plants at a private residence
No possession limit written into law for cannabis stored inside your own home, as long as it came from a legal source

Pros of the recreational limit

Simple and uniform across the state, with no paperwork
One ounce covers a typical month of personal flower use
Applies to visitors from out of state as well as residents

Cons of the recreational limit

The 8 gram concentrate cap is tight for daily dab or vape users
It says nothing about what you can legally bring across state lines, which is still a federal offense
Local ordinances can restrict where you consume even when possession is legal

Concentrated cannabis: how the 8 gram cap works

Concentrates are counted separately from flower. Hash, shatter, wax, live resin, rosin, distillate, and the oil inside a vape cartridge all count toward the 8 gram public limit. A single 1 gram cartridge uses one eighth of your allowance, which is why concentrate users tend to hit the ceiling faster than flower users.

Federal Cannabis Possession Laws in the USA

Edibles follow a different rule at the point of sale rather than at the point of possession. Licensed California retailers may sell edible products with no more than 100 milligrams of THC per package and 10 milligrams per serving. That is a packaging rule for dispensaries, not a possession limit, but it effectively caps how much THC a single legal edible package can contain.

Home cultivation and the harvest question

Adults 21 and older may grow up to six living cannabis plants at a private residence. The plants must be in a locked space and not visible from a public street or sidewalk. The cannabis produced by those six plants is legal to keep at home, and the 28.5 gram figure is a public carrying limit, not a household storage limit.

Several cities and counties ban outdoor cultivation outright or require permits and enclosed structures. Before you plant, check the ordinance for your city, because a legal grow under state law can still draw a local citation.

Medical cannabis patients: 8 ounces and 6 mature plants

Californians with a physician recommendation and a state Medical Cannabis Identification Card fall under Health and Safety Code section 11362.77. The default patient allowance is 8 ounces (226.8 grams) of dried cannabis or 6 mature plants plus 12 immature plants. Counties and cities may adopt higher limits by ordinance, and a few have done so, but the state default applies where no local rule exists.

A patient card also exempts you from some sales tax at participating retailers and gives you access to medical-only products and higher per-item THC limits in some product categories.

Pros of the medical pathway

Roughly eight times the recreational flower allowance
Higher plant count for patients who grow their own medicine
Tax relief at dispensaries that honor the card

Cons of the medical pathway

Requires a physician recommendation and, for the card, a state application fee
Card issuance takes time, and the recommendation must be renewed
Local limits still apply, so the higher state number is not automatic everywhere

Use-case recommendation: heavy daily users, patients managing a diagnosed condition, and home growers who need more than six plants get real value from the medical route. Occasional recreational users gain little from it.

Where the amount you carry does not matter

Possession is legal, but location can turn a legal amount into a violation. Keep these off your route:

School grounds, day care centers, and youth centers, plus a 1,000 foot buffer while children are present
Inside a vehicle while driving, unless the package is sealed and stored out of reach, ideally in the trunk
Any public place where tobacco smoking is banned, since public consumption follows the same rules
Federal land, including national parks and forests, where state law does not apply
Airports and security checkpoints
Across state lines, even into another legal state

Local rules that can shrink your allowance

California gives cities and counties broad authority over cultivation, storefronts, and public consumption. A city may ban outdoor grows, restrict where delivery drivers can hand off packages, or prohibit cannabis smoking in parks and plazas. None of these ordinances can lower the state possession cap for adults, but they can limit where you grow, buy, and consume. Check the municipal code for the city you are in rather than assuming the state rule is the whole picture.

Quick check before you leave the house

Are you 21 or older, or a documented medical patient?
Is your flower under 28.5 grams and your concentrate under 8 grams?
Are you staying out of schools, parks with smoking bans, and federal property?
Is anything you are carrying in a vehicle sealed and out of the driver's reach?
Does your city have a stricter rule about where you can consume?