When to plant Winter squash in Colorado
In fall, June 1 – 15.
USDA's earliest safe spring and latest safe fall planting dates, matched to each place's average frost dates.
| Place | Spring | Fall |
|---|---|---|
| Arvada | — | June 1 – 15 |
| Aurora | — | June 1 – July 1 |
| Berthoud | — | June 1 – 15 |
| Boulder | — | June 1 – 15 |
| Brighton | — | June 1 – July 1 |
| Broomfield | — | June 1 – July 1 |
| Cañon City | — | June 1 – July 1 |
| Castle Pines | — | June 1 – 15 |
| Castle Rock | — | June 1 – 15 |
| Centennial | — | June 1 – July 1 |
| Colorado Springs | — | June 1 – July 1 |
| Commerce City | — | June 1 – July 1 |
| Denver | — | June 1 – July 1 |
| Durango | — | June 1 – 15 |
| Englewood | — | June 1 – July 1 |
| Erie | — | June 1 – 15 |
| Evans | — | June 1 – July 1 |
| Federal Heights | — | June 1 – July 1 |
| Firestone | — | June 1 – 15 |
| Fort Collins | — | June 1 – July 1 |
| Fort Morgan | — | June 1 – July 1 |
| Fountain | — | June 1 – July 1 |
| Frederick | — | June 1 – 15 |
| Fruita | — | June 1 – July 1 |
| Glenwood Springs | — | June 1 – 15 |
| Golden | — | June 1 – July 1 |
| Grand Junction | — | June 1 – July 1 |
| Greeley | — | June 1 – July 1 |
| Greenwood Village | — | June 1 – July 1 |
| Johnstown | — | June 1 – 15 |
| Lafayette | — | June 1 – July 1 |
| Lakewood | — | June 1 – July 1 |
| Littleton | — | June 1 – July 1 |
| Lone Tree | — | June 1 – July 1 |
| Longmont | — | June 1 – 15 |
| Louisville | — | June 1 – 15 |
| Loveland | — | June 1 – 15 |
| Montrose | — | June 1 – July 1 |
| Monument | — | June 1 – 15 |
| Northglenn | — | June 1 – July 1 |
| Parker | — | June 1 – 15 |
| Pueblo | — | June 1 – July 1 |
| Rifle | — | June 1 – 15 |
| Severance | — | June 1 – July 1 |
| Steamboat Springs | — | Not listed |
| Sterling | — | June 1 – July 1 |
| Superior | — | June 1 – 15 |
| Thornton | — | June 1 – July 1 |
| Timnath | — | June 1 – July 1 |
| Wellington | — | June 1 – July 1 |
| Westminster | — | June 1 – July 1 |
| Wheat Ridge | — | June 1 – 15 |
| Windsor | — | June 1 – July 1 |
Planting dates: USDA Home and Garden Bulletin No. 9 (1967), tables 4 and 5. Frost dates: NOAA U.S. Climate Normals 1991–2020. “—” means the place's frost date is outside the table. The full USDA table for winter squash.