When to plant sweet potato in Arizona
Arizona spans USDA zones 6a–10a, so the right time to plant sweet potato shifts by weeks across the state. The window to transplant seedlings outdoors runs from about January 25 in Bullhead City to June 25 in Flagstaff — below are local dates for 68 cities, each computed from its own frost dates.
| City | Zone | Last frost | First frost | Transplant out |
|---|---|---|---|---|
| Phoenix | 9b | January 8 | December 25 | January 29 – February 12 |
| Tucson | 9b | February 5 | December 9 | February 26 – March 12 |
| Mesa | 9b | February 1 | December 10 | February 22 – March 8 |
| Gilbert | 9b | February 1 | December 11 | February 22 – March 8 |
| Chandler | 9b | February 13 | December 5 | March 6 – March 20 |
| Glendale | 9b | January 20 | December 15 | February 10 – February 24 |
| Scottsdale | 10a | January 27 | December 21 | February 17 – March 3 |
| Peoria | 9b | February 5 | December 11 | February 26 – March 12 |
Sweet Potato in Arizona: FAQ
When can I plant sweet potato in Arizona?
Across Arizona, the time to transplant sweet potato spans roughly January 25 in Bullhead City to June 25 in Flagstaff, each following that city's local frost dates.
Does the sweet potato planting date vary across Arizona?
Yes. Arizona publishes 68 cities with their own frost dates, so the right sweet potato 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 sweet potato take to grow in Arizona?
Sweet Potato takes about 90–120 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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