When to Plant Sweet Corn in Arizona
In Arizona, the time to sow sweet corn outside runs from Jan 11 – Jan 25 in Bullhead City to Jun 11 – Jun 25 in Flagstaff. In Phoenix, it's Jan 15 – Jan 29. The average last spring frost differs by about 22 weeks across the state (Jan 4 in Bullhead City, Jun 4 in Flagstaff), so use the dates for the town nearest you.
Sow corn in blocks rather than single rows so it pollinates well. Wait for soil around 60°F.
- Sow outside: 1–3 weeks after the last frost.
Sweet Corn planting dates in Arizona by city
| City | Zone | Sow outside |
|---|---|---|
| Apache Junction | 9b | Feb 18 – Mar 4 |
| Avondale | 9b | Jan 21 – Feb 4 |
| Buckeye | 9b | Jan 14 – Jan 28 |
| Bullhead City | 10a | Jan 11 – Jan 25 |
| Camp Verde | 8b | Apr 23 – May 7 |
| Casa Grande | 9a | Feb 12 – Feb 26 |
| Chandler | 9b | Feb 20 – Mar 6 |
| Chino Valley | 8a | May 4 – May 18 |
| Coolidge | 9a | Feb 24 – Mar 10 |
| Cottonwood | 8b | Apr 6 – Apr 20 |
| Douglas | 8a | Mar 25 – Apr 8 |
| El Mirage | 9b | Jan 27 – Feb 10 |
| Eloy | 9a | Mar 3 – Mar 17 |
| Flagstaff | 6a | Jun 11 – Jun 25 |
| Florence | 9a | Feb 6 – Feb 20 |
| Fountain Hills | 9b | Jan 13 – Jan 27 |
| Gilbert | 9b | Feb 8 – Feb 22 |
| Glendale | 9b | Jan 27 – Feb 10 |
| Goodyear | 9b | Jan 21 – Feb 4 |
| Kingman | 9a | Apr 9 – Apr 23 |
| Lake Havasu City | 10a | Jan 12 – Jan 26 |
| Marana | 9b | Apr 9 – Apr 23 |
| Maricopa | 9a | Mar 2 – Mar 16 |
| Mesa | 9b | Feb 8 – Feb 22 |
| Nogales | 8b | Mar 27 – Apr 10 |
| Oro Valley | 9a | Apr 9 – Apr 23 |
| Paradise Valley | 10a | Jan 13 – Jan 27 |
| Payson | 8b | May 6 – May 20 |
| Peoria | 9b | Feb 12 – Feb 26 |
| Phoenix | 9b | Jan 15 – Jan 29 |
| Prescott | 7b | May 7 – May 21 |
| Prescott Valley | 7b | May 7 – May 21 |
| Queen Creek | 9b | Feb 8 – Feb 22 |
| Sahuarita | 9a | Mar 4 – Mar 18 |
| Scottsdale | 10a | Feb 3 – Feb 17 |
| Show Low | 7a | May 12 – May 26 |
| Sierra Vista | 8b | Apr 12 – Apr 26 |
| Surprise | 9b | Feb 12 – Feb 26 |
| Tempe | 10a | Feb 20 – Mar 6 |
| Tucson | 9b | Feb 12 – Feb 26 |
Calculated from each town's average (50%) frost dates, from the nearest NOAA station (1991–2020). Typical dates for the 2027 planting season, based on NOAA's 1991–2020 averages. They are long-term odds, not a forecast: always check your local forecast before planting. Zones: 2023 USDA Plant Hardiness Zone Map (USDA-ARS and Oregon State University). Not the official map; see planthardiness.ars.usda.gov.
Parts of Arizona rarely see frost (for example Yuma, San Luis, Somerton). There, planting is timed by heat rather than frost, usually in the cooler months; look up your ZIP code for details.
See all frost dates in Arizona, or the general guide to when to plant sweet corn.
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