Washington was one of the first two states to legalize adult use cannabis in 2012. More than a decade later, it is still one of the few legal sales states where adults cannot grow a single plant at home for recreational use. For anyone in Washington thinking about a 2027 grow, the key question is whether you qualify under the medical rules. This guide explains the current law, what patients can do and what to watch in Olympia. It is general information for adults 21 and older, not legal advice.

Adult use home grow is still not allowed

Initiative 502 legalized possession and licensed sales but did not include home cultivation. Growing cannabis without a license or a medical authorization remains a crime in Washington, and it can be charged as a felony. That surprises many people because the state has been legal for so long.

Bills to allow adults to grow a few plants have been introduced in nearly every session since 2015. Some made it out of committee. None became law as of late 2026.

What adults can possess

Product	Limit for adults 21+
Usable cannabis	1 ounce
Solid infused products	16 ounces
Liquid infused products	72 ounces
Concentrates	7 grams

These limits come from the licensed market rules and apply in public.

Medical patients

Washington’s medical cannabis law lets authorized patients grow at home. The rules depend on whether the patient is entered in the state’s medical cannabis authorization database:

• Patients in the database may generally grow up to six plants and possess up to eight ounces of usable cannabis produced from those plants. A healthcare practitioner may authorize more, up to 15 plants, if medically warranted.
• Patients not in the database have a lower limit, generally four plants and six ounces from those plants, and fewer legal protections.
• Housing unit cap. No more than 15 plants may be grown in a single housing unit, even if several patients live there, with limited exceptions.

Patients may also form small cooperatives, with up to four members, registered with the state. Cooperatives must follow location and registration rules.

Where patient plants can be grown

Patient grows should be in a secure space at the patient’s home, not visible or smellable from a public place in ways that create a nuisance, and away from minors. Landlords may prohibit growing on their property.

Why home grow keeps stalling

Opponents have raised concerns about enforcement, diversion into the illicit market and the effect on licensed growers. Supporters argue that most legal states allow home grow without those problems and that adults should be able to grow a few plants the way they brew beer. The debate is likely to continue.

What to watch in 2027

Washington’s 2027 session is a long, budget writing session, which gives home grow bills more time to move. If a bill passes, expect a small plant cap, secure growing requirements and a delayed effective date. Until then, adults without medical authorization should not plant.

Seeds and clones

You may see seeds for sale in Washington and licensed retailers can sell some immature plants and seeds to medical patients under state rules. Buying seeds does not authorize cultivation for adults without medical status. Federal seed rules are also changing, which we cover in our explainer linked below.

Practical notes for qualifying patients

Western Washington is cool and damp. Indoor grows in a locked tent give patients the most control. Our complete grow tent setup guide covers basics. East of the Cascades, outdoor seasons are drier and hotter, but patients still need security and privacy.

Keep your authorization and database card with your grow. Write a plant count on paper and update it when plants move between stages.

Common Washington myths

“It’s been legal since 2012, so a few plants are fine.” Adult use home grow is still illegal without medical authorization, and it can be charged as a felony.

“A medical card from another state works here.” Washington’s patient protections apply to patients authorized under Washington law.

“Buying a clone from a store makes it legal.” Licensed retailers can sell certain plants and seeds only to qualifying medical patients under state rules. A purchase does not create permission for others.

“Possession limits cover my harvest.” Patients have specific harvest limits tied to their plant authorization. Keep records.

How Washington compares with Oregon

Just across the Columbia River, Oregon lets adults grow four plants per household. Do not carry plants or cannabis across the state line. Federal law treats interstate transport as a crime.

Growing notes for authorized patients in Washington

Western Washington, from Seattle to Olympia, has cool summers and early autumn rain, so outdoor flowers often struggle with mold by October. East of the Cascades, Yakima, the Tri Cities and Spokane get hotter, drier summers with real frost risk at both ends of the season. Because Washington patient grows must stay out of public view and inside the patient’s own housing, many patients grow indoors under lights where they control humidity and timing.

Keep patient paperwork near the grow and store harvested cannabis apart from other household items. If several patients live in one home, remember the household cap still applies. A tidy, documented grow is easier to explain if anyone asks.

Key takeaways

• Adults without medical authorization cannot grow at home in Washington.
• Database patients can generally grow six plants, up to 15 with authorization.
• No more than 15 plants per housing unit.
• Landlords can say no.
• Watch the 2027 long session for home grow bills.

Our Washington seed page is written for authorized patients and collectors.

Grow legally and responsibly

Home cultivation is only legal in some states, and each state sets its own plant limits, locking rules and rules about whether plants can be visible from a public place. You must be 21 or older to buy seeds from Kind Seed Co, and you should grow only where your state and city allow it. Check your state rules in our guide to the legal requirements for growing weed plants in your state before you plant. Federal treatment of cannabis seeds is also changing, so read our December 11 2026 seed rule explainer before you order. Keep plants and harvested flower locked away from children, pets and visitors, and never drive after using cannabis. This article is general information about gardening. It is not legal advice and it is not medical advice.

Frequently asked questions

Can adults grow weed at home in Washington State?

No. Adult use home growing is still illegal without medical authorization.

How many plants can a medical patient grow in Washington?

Patients in the authorization database can generally grow six plants, or up to 15 if a practitioner authorizes it.

Is there a limit per home?

Generally no more than 15 plants per housing unit.

Will Washington allow home grow in 2027?

Bills are filed often but none had passed as of late 2026. Watch the 2027 session.

Ready to start

Browse the full range in the Kind Seed Co shop or go straight to marijuana seeds washington. Kind Seed Co sells only to adults 21 and older. Always follow the home grow laws where you live.