Colorado Amendment 64 and CRS §18-18-406 allow adults 21+ to grow up to six marijuana plants per person, with no more than 12 plants per residence regardless of how many adults live there. Boulder follows the state cap.
Personal cultivation in Boulder is governed by Colorado Amendment 64 (2012) as implemented in CRS §18-18-406. Each adult 21 or older may possess up to six marijuana plants, of which no more than three may be flowering at one time. A single residence may host at most 12 plants total even if more than two adults live there — a cap added by HB17-1220 to address grey-market diversion. Plants must be grown in a fully enclosed locked space and kept out of public view. Boulder does not require a city permit for compliant home cultivation, but landlords may prohibit it in the lease. Medical patients with extended-plant-count waivers must register with the Colorado Marijuana Enforcement Division.
Exceeding the six-plant per-adult or twelve-plant per-residence cap, growing in public view, or cultivating without a locked enclosure can support criminal charges under CRS §18-18-406 and city nuisance enforcement.
Boulder, CO
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Boulder, CO
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See how Boulder's personal cultivation limits rules stack up against other locations.
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