Arizona planting zones & frost dates
USDA hardiness zones in Arizona go from 6a to 10a. Pick your city for its average frost dates and a planting calendar, or search by ZIP code.
| City | Zone | Avg. last frost | Avg. first frost |
|---|---|---|---|
| Apache Junction | 9b | Feb 11 | Dec 10 |
| Arizona City | 9a | Feb 28 | Nov 21 |
| Avondale | 9b | Jan 7 | Dec 24 |
| Buckeye | 9b | Jan 7 | Dec 24 |
| Bullhead City | 9b | Jan 4 | Dec 23 |
| Camp Verde | 8a | Apr 16 | Oct 30 |
| Casa Grande | 9a | Feb 5 | Dec 6 |
| Casas Adobes | 9a | Feb 26 | Dec 4 |
| Catalina Foothills | 9a | Feb 20 | Nov 27 |
| Chandler | 9b | Feb 13 | Dec 5 |
| Chino Valley | 8a | Apr 27 | Oct 24 |
| Coolidge | 9a | Feb 17 | Nov 29 |
| Cottonwood | 8b | Mar 30 | Nov 10 |
| Douglas | 8a | Mar 18 | Nov 13 |
| Drexel Heights | 9b | Feb 5 | Dec 9 |
| El Mirage | 9b | Jan 20 | Dec 15 |
| Eloy | 9a | Feb 24 | Nov 28 |
| Flagstaff | 6a | Jun 4 | Sep 28 |
| Florence | 9a | Jan 30 | Dec 12 |
| Flowing Wells | 9b | Feb 11 | Dec 2 |
| Fortuna Foothills | 10a | rare | rare |
| Fountain Hills | 9b | Jan 6 | Dec 28 |
| Gilbert | 9b | Feb 13 | Dec 5 |
| Glendale | 9b | Jan 20 | Dec 15 |
| Gold Camp | 9b | Jan 18 | Dec 28 |
| Gold Canyon | 9b | Feb 11 | Dec 10 |
| Goodyear | 9b | Jan 7 | Dec 24 |
| Green Valley | 9a | Feb 25 | Nov 27 |
| Kingman | 8b | Apr 2 | Nov 11 |
| Lake Havasu City | 10a | rare | rare |
| Marana | 9b | Feb 23 | Dec 6 |
| Maricopa | 9a | Feb 23 | Nov 24 |
| Mesa | 9b | Feb 13 | Dec 5 |
| New Kingman-Butler | 8b | Apr 2 | Nov 11 |
| New River | 9b | Jan 15 | Dec 22 |
| Nogales | 8b | Mar 20 | Nov 17 |
| Oro Valley | 9a | Apr 2 | Nov 11 |
| Paradise Valley | 10a | Jan 6 | Dec 26 |
| Payson | 8b | Apr 29 | Oct 24 |
| Peoria | 9b | Jan 20 | Dec 15 |
| Phoenix | 10a | rare | rare |
| Prescott | 7b | Apr 30 | Oct 20 |
| Prescott Valley | 7b | Apr 20 | Oct 27 |
| Queen Creek | 9b | Feb 1 | Dec 11 |
| Rio Rico | 8b | Apr 16 | Nov 2 |
| Saddlebrooke | 9a | Apr 2 | Nov 11 |
| Sahuarita | 9a | Feb 25 | Nov 27 |
| San Luis | 10a | rare | rare |
| San Tan Valley | 9b | Feb 1 | Dec 11 |
| Scottsdale | 10a | Feb 13 | Dec 5 |
| Sedona | 8b | Apr 1 | Nov 17 |
| Show Low | 7a | May 5 | Oct 15 |
| Sierra Vista | 8b | Apr 5 | Nov 9 |
| Sierra Vista Southeast | 8b | Apr 5 | Nov 9 |
| Somerton | 10a | rare | rare |
| Sun City | 9b | Jan 20 | Dec 15 |
| Sun City West | 9b | Jan 20 | Dec 15 |
| Sun Lakes | 9b | Feb 1 | Dec 11 |
| Surprise | 9b | Jan 20 | Dec 15 |
| Tanque Verde | 9a | Jan 26 | Dec 16 |
| Tempe | 10a | Feb 13 | Dec 5 |
| Tempe Junction | 9b | Feb 13 | Dec 5 |
| Tucson | 9b | Jan 20 | Dec 17 |
| Tucson Estates | 9b | Feb 8 | Dec 10 |
| Vail | 9a | Jan 26 | Dec 16 |
| Verde Village | 8b | Mar 30 | Nov 10 |
| West Sedona | 8b | Apr 1 | Nov 17 |
| Yuma | 10a | rare | rare |
Cities with 10,000+ residents. Data: USDA Plant Hardiness Zone Map 2023 and NOAA Climate Normals 1991–2020. Sources and method.