Home Cultivation: Boulder vs Longmont
How do home cultivation rules compare between Boulder, CO and Longmont, CO?
Boulder and Longmont have similar restriction levels.
Boulder, CO
Boulder County
Boulder permits limited home cannabis cultivation for personal use under state law. Plant counts, grow area, and visibility restrictions apply. Local ordinances may add further limits.
View full Boulder rules →Longmont, CO
Boulder County
Longmont allows personal-use marijuana home cultivation in line with Colorado state law. Under LMC § 9.60.060, no more than 30 marijuana plants may be cultivated in any single dwelling unit, including a dwelling unit in which up to five unrelated individuals reside. State law (Colorado Constitution Article XVIII, Section 16 and C.R.S. 18-18-406) caps each adult 21+ at six plants, and the household total at twelve plants for two or more adults — Longmont's 30-plant per-unit ceiling functions as the upper bound where multiple medical patients or unrelated adults share a residence.
View full Longmont rules →Key Facts Comparison
| Fact | Boulder | Longmont |
|---|---|---|
| Legal Status | Recreational legal | - |
| Plant Limit | Typically 6 per household | - |
| Visibility | Must be enclosed/hidden | - |
| Topic | Home Cultivation | - |
| City Code | - | LMC § 9.60.060 — 30 plants max per dwelling unit |
| Per-Adult Limit | - | 6 plants (3 flowering) — C.R.S. 18-18-406 |
| Household Cap | - | 12 plants per residence — C.R.S. 18-18-406.3 (HB 17-1220) |
| Enclosed/Locked | - | Required — including outdoor grows |
| Visible from Public | - | Prohibited |
| Commercial Cultivation | - | Prohibited within Longmont city limits |
Highlighted rows indicate differences between cities.
Boulder FAQ
Can I grow cannabis at home?
Yes, adults 21+ can grow a limited number of plants in an enclosed area, but local rules may add restrictions.
What are the penalties for illegal growing?
Exceeding plant limits can result in fines up to $500. Growing for unlicensed sale leads to criminal charges.
Longmont FAQ
How many marijuana plants can I grow at my Longmont home?
Each adult 21+ may grow up to six plants (three flowering) under Colorado Amendment 64 and C.R.S. 18-18-406, with a hard household cap of 12 plants under C.R.S. 18-18-406.3 — regardless of how many adults live there. LMC § 9.60.060 sets Longmont's per-dwelling ceiling at 30 plants, which only applies in caregiver or multi-patient scenarios. Plants must be in an enclosed, locked space not visible from any public place.
Can I grow marijuana outdoors in my Longmont backyard?
Only inside an enclosed, locked space. Open-air outdoor cultivation visible from a public place is prohibited under Colorado law and LMC Chapter 9.60. A secured greenhouse, a locked privacy-fence enclosure, or a locked accessory structure can meet the requirement; an unfenced garden cannot. Sale or distribution of home-grown product is a separate criminal offense.
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