CannaGLAP
Home grow in Colorado
Grow cannabis at home in Colorado: city by city
The same plant behaves differently in every town: frost dates, summer heat and humidity decide when to start, when to move plants outside, and what to watch for in the tent. Here is Colorado, city by city, from NOAA's 30-year weather records.
Adults 21 and over: yes (residents). Plant limit: 6 per resident, 3 or fewer flowering; 12 per residential property unless local law allows more.
Enclosed, locked area not openly visible; separate locked space if anyone under 21 lives there; local rules can be stricter. Source: Colorado home grow laws; 12 plant cap: HB 17-1220. Local rules (landlords, HOAs, city codes) can add more; this is a summary, not legal advice.
| City | Start indoors | Move outdoors | Last frost (typical) |
|---|---|---|---|
| Denver | Apr 1 to Apr 15 | May 13 | Apr 30 |
| Colorado Springs | Apr 8 to Apr 22 | May 20 | May 3 |
| Aurora | Apr 9 to Apr 23 | May 21 | May 4 |
| Fort Collins | Apr 7 to Apr 21 | May 19 | May 2 |
| Lakewood | Apr 6 to Apr 20 | May 18 | May 3 |
| Thornton | Apr 6 to Apr 20 | May 18 | May 2 |
| Arvada | Apr 13 to Apr 27 | May 25 | May 5 |
| Westminster | Apr 6 to Apr 20 | May 18 | May 2 |
| Pueblo | Apr 2 to Apr 16 | May 14 | Apr 30 |
| Centennial | Apr 11 to Apr 25 | May 23 | May 5 |
| Greeley | Apr 5 to Apr 19 | May 17 | May 2 |
| Boulder | Apr 12 to Apr 26 | May 24 | May 6 |
| Highlands Ranch | Apr 11 to Apr 25 | May 23 | May 5 |
| Longmont | Apr 16 to Apr 30 | May 28 | May 7 |
| Loveland | Apr 21 to May 5 | Jun 2 | May 10 |
| Broomfield | Apr 6 to Apr 20 | May 18 | May 2 |
| Castle Rock | Apr 15 to Apr 29 | May 27 | May 9 |
| Grand Junction | Mar 18 to Apr 1 | Apr 29 | Apr 14 |
| Commerce City | Apr 9 to Apr 23 | May 21 | May 4 |
| Parker | Apr 19 to May 3 | May 31 | May 9 |
| Littleton | Apr 7 to Apr 21 | May 19 | May 2 |
| Brighton | Apr 10 to Apr 24 | May 22 | May 3 |
| Northglenn | Apr 6 to Apr 20 | May 18 | May 2 |
| Englewood | Apr 7 to Apr 21 | May 19 | May 2 |
| Lafayette | Apr 6 to Apr 20 | May 18 | May 2 |
Planting dates follow the rules on each city page: after the frost date that held 9 years in 10 and once nights average 45°F, and never before April 15. Weather: NOAA 1991 to 2020 normals.