When to plant swiss chard in Arizona
Arizona spans USDA zones 6a–10a, so the right time to plant swiss chard shifts by weeks across the state. The window to sow seed directly outdoors runs from about December 21 in Bullhead City to May 21 in Flagstaff — below are local dates for 68 cities, each computed from its own frost dates.
| City | Zone | Last frost | First frost | Direct sow |
|---|---|---|---|---|
| Phoenix | 9b | January 8 | December 25 | December 25 – February 5 |
| Tucson | 9b | February 5 | December 9 | January 22 – March 5 |
| Mesa | 9b | February 1 | December 10 | January 18 – March 1 |
| Gilbert | 9b | February 1 | December 11 | January 18 – March 1 |
| Chandler | 9b | February 13 | December 5 | January 30 – March 13 |
| Glendale | 9b | January 20 | December 15 | January 6 – February 17 |
| Scottsdale | 10a | January 27 | December 21 | January 13 – February 24 |
| Peoria | 9b | February 5 | December 11 | January 22 – March 5 |
Swiss Chard in Arizona: FAQ
When can I plant swiss chard in Arizona?
Across Arizona, the time to direct-sow swiss chard spans roughly December 21 in Bullhead City to May 21 in Flagstaff, each following that city's local frost dates.
Does the swiss chard planting date vary across Arizona?
Yes. Arizona publishes 68 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 Arizona?
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.
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.