When to plant Broccoli and brussels sprouts in Colorado
In spring, from Mar 15 – Apr 15 in Grand Junction to May 20 – June 10 in Steamboat Springs.
For a fall crop, from May 1 – June 1 in Steamboat Springs to July 1 – Aug 1 in Grand Junction.
USDA gives brussels sprouts the same planting dates as broccoli.
Dates are for setting out plants. USDA's earliest safe spring and latest safe fall planting dates, matched to each place's average frost dates.
| Place | Spring | Fall |
|---|---|---|
| Arvada | Apr 1 – May 1 | June 1 – 30 |
| Aurora | Apr 15 – June 1 | June 15 – July 15 |
| Berthoud | Apr 15 – June 1 | June 1 – 30 |
| Boulder | Apr 15 – June 1 | June 1 – 30 |
| Brighton | Apr 1 – May 1 | June 15 – July 15 |
| Broomfield | Apr 1 – May 1 | June 15 – July 15 |
| Cañon City | Apr 1 – May 1 | June 15 – July 15 |
| Castle Pines | Apr 15 – June 1 | June 1 – 30 |
| Castle Rock | Apr 15 – June 1 | June 1 – 30 |
| Centennial | Apr 1 – May 1 | June 15 – July 15 |
| Colorado Springs | Apr 1 – May 1 | June 15 – July 15 |
| Commerce City | Apr 1 – May 1 | June 15 – July 15 |
| Denver | Apr 1 – May 1 | June 15 – July 15 |
| Durango | May 1 – June 15 | June 1 – 30 |
| Englewood | Apr 1 – May 1 | June 15 – July 15 |
| Erie | Apr 15 – June 1 | June 1 – 30 |
| Evans | Apr 1 – May 1 | June 15 – July 15 |
| Federal Heights | Apr 1 – May 1 | June 15 – July 15 |
| Firestone | Apr 15 – June 1 | June 1 – 30 |
| Fort Collins | Apr 1 – May 1 | June 15 – July 15 |
| Fort Morgan | Apr 15 – June 1 | June 15 – July 15 |
| Fountain | Apr 1 – May 1 | June 15 – July 15 |
| Frederick | Apr 15 – June 1 | June 1 – 30 |
| Fruita | Apr 1 – May 1 | June 15 – July 15 |
| Glenwood Springs | Apr 15 – June 1 | June 1 – 30 |
| Golden | Apr 1 – May 1 | June 15 – July 15 |
| Grand Junction | Mar 15 – Apr 15 | July 1 – Aug 1 |
| Greeley | Apr 1 – May 1 | June 15 – July 15 |
| Greenwood Village | Apr 15 – June 1 | June 15 – July 15 |
| Johnstown | Apr 15 – June 1 | June 1 – 30 |
| Lafayette | Apr 1 – May 1 | June 15 – July 15 |
| Lakewood | Apr 1 – May 1 | June 15 – July 15 |
| Littleton | Apr 1 – May 1 | June 15 – July 15 |
| Lone Tree | Apr 1 – May 1 | June 15 – July 15 |
| Longmont | Apr 15 – June 1 | June 1 – 30 |
| Louisville | Apr 15 – June 1 | June 1 – 30 |
| Loveland | Apr 15 – June 1 | June 1 – 30 |
| Montrose | Apr 1 – May 1 | June 15 – July 15 |
| Monument | May 1 – June 15 | June 1 – 30 |
| Northglenn | Apr 1 – May 1 | June 15 – July 15 |
| Parker | Apr 15 – June 1 | June 1 – 30 |
| Pueblo | Apr 1 – May 1 | June 15 – July 15 |
| Rifle | Apr 15 – June 1 | June 1 – 30 |
| Severance | Apr 1 – May 1 | June 15 – July 15 |
| Steamboat Springs | May 20 – June 10 | May 1 – June 1 |
| Sterling | Apr 1 – May 1 | June 15 – July 15 |
| Superior | Apr 15 – June 1 | June 1 – 30 |
| Thornton | Apr 1 – May 1 | June 15 – July 15 |
| Timnath | Apr 1 – May 1 | June 15 – July 15 |
| Wellington | Apr 1 – May 1 | June 15 – July 15 |
| Westminster | Apr 1 – May 1 | June 15 – July 15 |
| Wheat Ridge | Apr 1 – May 1 | June 1 – 30 |
| Windsor | Apr 1 – May 1 | June 15 – July 15 |
Planting dates: USDA Home and Garden Bulletin No. 9 (1967), tables 4 and 5. Frost dates: NOAA U.S. Climate Normals 1991–2020. The full USDA table for broccoli.
Updated