When to plant swiss chard in Colorado
Colorado spans USDA zones 5b–7a, so the right time to plant swiss chard shifts by weeks across the state. The window to sow seed directly outdoors runs from about March 31 in Grand Junction to June 7 in Edwards — below are local dates for 70 cities, each computed from its own frost dates.
| City | Zone | Last frost | First frost | Direct sow |
|---|---|---|---|---|
| Denver | 6a | May 4 | October 8 | April 20 – June 1 |
| Colorado Springs | 6a | May 3 | October 8 | April 19 – May 31 |
| Aurora | 6a | May 7 | October 8 | April 23 – June 4 |
| Fort Collins | 5b | May 2 | October 7 | April 18 – May 30 |
| Lakewood | 6a | May 3 | October 7 | April 19 – May 31 |
| Thornton | 6a | May 2 | October 11 | April 18 – May 30 |
| Arvada | 6a | May 5 | October 5 | April 21 – June 2 |
| Westminster | 6a | May 2 | October 11 | April 18 – May 30 |
Swiss Chard in Colorado: FAQ
When can I plant swiss chard in Colorado?
Across Colorado, the time to direct-sow swiss chard spans roughly March 31 in Grand Junction to June 7 in Edwards, each following that city's local frost dates.
Does the swiss chard planting date vary across Colorado?
Yes. Colorado publishes 70 cities with their own frost dates, so the right swiss chard planting window shifts by weeks between the warmest and coldest parts of the state — use your city's page for the exact dates.
How long does swiss chard take to grow in Colorado?
Swiss Chard takes about 50–60 days to reach harvest once planted — check that this fits inside your city's frost-free season on its place page.
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