When to Plant Sweet Corn in Delaware
In Delaware, the time to sow sweet corn outside runs from Apr 11 – Apr 25 in Dover to Apr 18 – May 2 in Milford. In Wilmington, it's Apr 14 – Apr 28.
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 Delaware by city
| City | Zone | Sow outside |
|---|---|---|
| Dover | 7b | Apr 11 – Apr 25 |
| Elsmere | 7b | Apr 14 – Apr 28 |
| Georgetown | 7b | Apr 11 – Apr 25 |
| Middletown | 7b | Apr 14 – Apr 28 |
| Milford | 7b | Apr 18 – May 2 |
| Millsboro | 7b | Apr 11 – Apr 25 |
| New Castle | 7b | Apr 14 – Apr 28 |
| Newark | 7b | Apr 14 – Apr 28 |
| Seaford | 7b | Apr 18 – May 2 |
| Smyrna | 7b | Apr 11 – Apr 25 |
| Wilmington | 7b | Apr 14 – Apr 28 |
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 Delaware, or the general guide to when to plant sweet corn.
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