Whatcom County, WA Cannabis Regulations: Home Cultivation (2026)
Key Facts
- Default tier
- 6 plants, 8 oz useable cannabis
- Higher-need tier
- 15 plants, 16 oz useable cannabis
- Not database-enrolled
- 4 plants, 6 oz useable cannabis
- Who qualifies
- Registered qualifying patients/designated providers only
- Governing law
- RCW 69.51A.210 (state, not county)
- Non-patients
- No legal home cultivation allowance
Summary
Home cannabis cultivation in unincorporated Whatcom County is governed entirely by Washington's medical cannabis statute, not a county ordinance. A registered qualifying patient may grow six plants and keep eight ounces of useable cannabis by default, up to fifteen plants and sixteen ounces if a health care professional certifies greater medical need, or only four plants and six ounces if never entered into the state database.
As part of authorizing a qualifying patient or designated provider, the health care professional may include recommendations on the amount of cannabis that is likely needed... The qualifying patient or designated provider may also grow, in his or her domicile, up to six plants for the personal medical use of the qualifying patient and possess up to eight ounces of useable cannabis produced from his or her plants. (2) If the health care professional determines that the medical needs of a qualifying patient exceed the amounts provided for in subsection (1) of this section... it is recommended that the patient be allowed to grow, in his or her domicile, up to fifteen plants for the personal medical use of the patient. A patient so authorized may possess up to sixteen ounces of useable cannabis in his or her domicile. (3) If a qualifying patient or designated provider... has not been entered into the medical cannabis authorization database... the qualifying patient or the designated provider may grow, in his or her domicile, up to four plants for the personal medical use of the qualifying patient and possess up to six ounces of useable cannabis in his or her domicile.
Full Breakdown
210 sets three tiers tied to a qualifying patient's or designated provider's authorization from a health care professional. If the professional does not specify an amount, the cannabis retailer holding a medical cannabis endorsement enters a default allowance when adding the patient to the state's medical cannabis authorization database: the patient may grow up to six plants in their domicile and possess up to eight ounces of useable cannabis produced from those plants, on top of retail purchase limits of 48 ounces of solid infused product, three ounces of useable cannabis, 216 ounces of liquid infused product, or 21 grams of concentrate.
If the health care professional determines the patient's medical needs exceed that default, the authorization must specify a higher tier: up to fifteen plants in the domicile and possession of up to sixteen ounces of useable cannabis. Both tiers are printed on the recognition card issued through the database. 360. None of this applies to anyone without a qualifying patient or designated provider authorization; adult-use (recreational) home cultivation remains illegal statewide, and Whatcom County has adopted no separate local ordinance addressing where or how a home grow may occur within the unincorporated area, including Point Roberts and Birch Bay.
Violations & Fines
Growing more plants or holding more useable cannabis than a patient's authorized tier permits removes the legal protection RCW 69.51A.040 gives compliant patients and designated providers, exposing the grower to prosecution under the state's cannabis possession and manufacturing statutes (RCW 69.50). Non-patients have no lawful home-grow allowance at all; the Whatcom County Sheriff's Office and local courts handle any plant count above a patient's certified tier as an ordinary marijuana manufacturing violation.
Frequently Asked Questions
Can anyone in Whatcom County grow cannabis at home?
How many plants can a Whatcom County medical patient grow?
What if I never enrolled in the state medical cannabis database?
Does Whatcom County add its own zoning rules for a home grow?
Sources & Official References
Other rules in Whatcom County
Compare Whatcom County to another location·View the Washington cannabis regulations overview
See something wrong?
Help us keep this page accurate. If you notice an error or outdated information, let us know.