When to Plant Sweet Corn in Alaska
In Alaska, the time to sow sweet corn outside runs from Apr 11 – Apr 25 in Ketchikan to May 31 – Jun 14 in Kenai. In Anchorage, it's May 23 – Jun 6. The average last spring frost differs by about 7 weeks across the state (Apr 4 in Ketchikan, May 24 in Kenai), 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 Alaska by city
| City | Zone | Sow outside |
|---|---|---|
| Anchorage | 5a | May 23 – Jun 6 |
| Bethel | 4a | May 28 – Jun 11 |
| Fairbanks | 2a | May 23 – Jun 6 |
| Homer | 6a | May 17 – May 31 |
| Juneau | 6a | May 10 – May 24 |
| Kenai | 4b | May 31 – Jun 14 |
| Ketchikan | 8a | Apr 11 – Apr 25 |
| Kodiak | 7b | May 6 – May 20 |
| Palmer | 5a | May 13 – May 27 |
| Sitka | 7b | May 10 – May 24 |
| Wasilla | 5a | May 23 – Jun 6 |
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.
See all frost dates in Alaska, or the general guide to when to plant sweet corn.
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