Adults 21 and over in Washington can buy and possess up to 1 ounce of cannabis flower, 7 grams of concentrate, 16 ounces of solid edibles and 72 ounces of infused liquids. These are personal possession limits, and stores may not sell you more than that amount. Registered medical patients can buy up to three times the adult-use limits at medically endorsed stores.
Washington's Adult-Use Limits
Under RCW 69.50.360 and RCW 69.50.4013, an adult 21 or older can legally buy and possess:
- 1 ounce (28 grams) of usable cannabis flower
- 7 grams of cannabis concentrate (wax, shatter, vape oil)
- 16 ounces of solid cannabis-infused products (edibles)
- 72 ounces of liquid cannabis-infused products — or, for low-dose drinks packaged at 4 mg THC or less per unit, up to 200 mg of THC
How Combined Purchases Work
Stores may not help anyone obtain more than the personal possession amount (WAC 314-55-095). Because the limits are possession limits, buying the maximum at several Spokane stores in one day can put you over the legal amount.
Medical Patient Limits
Registered patients with a DOH recognition card can buy up to three times the adult-use amounts at medically endorsed stores. See medical marijuana in Spokane.
What You Can't Do With Your Purchase
You can’t use it in public (a civil infraction), keep an opened package in a car’s passenger area (a traffic infraction), or take it into Idaho, across any state line or onto a flight. Recreational home growing is also not legal in Washington.
Washington Purchase Limits FAQ
How much weed can you buy at once in Washington?
Up to 1 ounce of flower, 7 grams of concentrate, 16 ounces of solid edibles and 72 ounces of infused liquids for adults 21 and over.
Is the Washington limit per day or per purchase?
The limits are personal possession amounts, and stores may not sell you more than that. Buying more at another store could put you over the legal limit.
How much can medical patients buy in Washington?
Registered patients with a recognition card can buy up to three times the adult-use limits at medically endorsed stores.
Is Washington's limit lower than Oregon's?
Yes. Oregon allows 2 ounces of flower per day; Washington's limit is 1 ounce.
Can you grow weed at home in Washington?
Not for recreational use. Only qualifying medical patients may grow.
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