When to plant asparagus in Colorado
Colorado spans USDA zones 5b–7a, so the right time to plant asparagus shifts by weeks across the state. The window to transplant seedlings outdoors runs from about March 17 in Grand Junction to May 24 in Edwards — below are local dates for 70 cities, each computed from its own frost dates.
| City | Zone | Last frost | First frost | Transplant out |
|---|---|---|---|---|
| Denver | 6a | May 4 | October 8 | April 6 – April 20 |
| Colorado Springs | 6a | May 3 | October 8 | April 5 – April 19 |
| Aurora | 6a | May 7 | October 8 | April 9 – April 23 |
| Fort Collins | 5b | May 2 | October 7 | April 4 – April 18 |
| Lakewood | 6a | May 3 | October 7 | April 5 – April 19 |
| Thornton | 6a | May 2 | October 11 | April 4 – April 18 |
| Arvada | 6a | May 5 | October 5 | April 7 – April 21 |
| Westminster | 6a | May 2 | October 11 | April 4 – April 18 |
Asparagus in Colorado: FAQ
When can I plant asparagus in Colorado?
Across Colorado, the time to transplant asparagus spans roughly March 17 in Grand Junction to May 24 in Edwards, each following that city's local frost dates.
Does the asparagus planting date vary across Colorado?
Yes. Colorado publishes 70 cities with their own frost dates, so the right asparagus planting window shifts by weeks between the warmest and coldest parts of the state — use your city's page for the exact dates.
Never miss a window in your area
An email when it’s time to start seeds, transplant, and sow — timed to your frost dates. Double opt-in, one-click unsubscribe, no spam.