Frost dates by location
| Location | Zone | Last spring frost | First fall frost | Frost-free days |
|---|---|---|---|---|
| Flagstaff | 6a | Jun 4 | Sep 28 | 116 |
| Phoenix | 10a | Jan 8 | Dec 25 | 351 |
| Tucson | 9b | Feb 5 | Dec 9 | 307 |
| Mesa | 9b | — | — | year-round |
| Chandler | 9b | — | — | year-round |
| Gilbert | 9b | — | — | year-round |
| Glendale | 9b | — | — | year-round |
| Scottsdale | 9b | — | — | year-round |
| Maryvale | 9b | — | — | year-round |
| Peoria | 9b | — | — | year-round |
| Tempe | 9b | — | — | year-round |
| Deer Valley | 9b | — | — | year-round |
| Tempe Junction | 9b | — | — | year-round |
| Surprise | 9b | — | — | year-round |
| Alhambra | 9b | — | — | year-round |
| Yuma | 10a | — | — | year-round |
| Ahwatukee Foothills | 9b | — | — | year-round |
Zones in Arizona
Bottom line: a statewide planting date is a compromise nobody's garden actually
lives at. Arizona's last-frost spread is
147 days wide. Use the location nearest you.
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