When to Plant Sweet Corn in Missouri
In Missouri, the time to sow sweet corn outside runs from Apr 8 – Apr 22 in St. Louis to Apr 26 – May 10 in St. Joseph. In Kansas City, it's Apr 11 – Apr 25. The average last spring frost differs by about 3 weeks across the state (Apr 1 in St. Louis, Apr 19 in St. Joseph), 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 Missouri by city
| City | Zone | Sow outside |
|---|---|---|
| Arnold | 7a | Apr 16 – Apr 30 |
| Ballwin | 7a | Apr 11 – Apr 25 |
| Belton | 6b | Apr 20 – May 4 |
| Blue Springs | 6b | Apr 14 – Apr 28 |
| Cape Girardeau | 7a | Apr 12 – Apr 26 |
| Chesterfield | 7a | Apr 11 – Apr 25 |
| Columbia | 6b | Apr 12 – Apr 26 |
| Creve Coeur | 7a | Apr 11 – Apr 25 |
| Farmington | 6b | Apr 20 – May 4 |
| Florissant | 7a | Apr 9 – Apr 23 |
| Gladstone | 6b | Apr 11 – Apr 25 |
| Grandview | 6b | Apr 14 – Apr 28 |
| Hazelwood | 7a | Apr 9 – Apr 23 |
| Independence | 6b | Apr 17 – May 1 |
| Jefferson City | 6b | Apr 15 – Apr 29 |
| Joplin | 7a | Apr 16 – Apr 30 |
| Kansas City | 6b | Apr 11 – Apr 25 |
| Kirkwood | 7a | Apr 8 – Apr 22 |
| Lake St. Louis | 6b | Apr 17 – May 1 |
| Lee's Summit | 6b | Apr 14 – Apr 28 |
| Liberty | 6a | Apr 26 – May 10 |
| Maryland Heights | 7a | Apr 11 – Apr 25 |
| Nixa | 6b | Apr 22 – May 6 |
| O'Fallon | 6b | Apr 17 – May 1 |
| Ozark | 6b | Apr 22 – May 6 |
| Raymore | 6b | Apr 20 – May 4 |
| Raytown | 6b | Apr 14 – Apr 28 |
| Republic | 6b | Apr 16 – Apr 30 |
| Rolla | 6b | Apr 12 – Apr 26 |
| Sedalia | 6b | Apr 25 – May 9 |
| Springfield | 7a | Apr 11 – Apr 25 |
| St. Charles | 6b | Apr 15 – Apr 29 |
| St. Joseph | 6a | Apr 26 – May 10 |
| St. Louis | 7a | Apr 8 – Apr 22 |
| St. Peters | 6b | Apr 16 – Apr 30 |
| University City | 7a | Apr 8 – Apr 22 |
| Warrensburg | 6b | Apr 21 – May 5 |
| Webster Groves | 7a | Apr 8 – Apr 22 |
| Wentzville | 6b | Apr 17 – May 1 |
| Wildwood | 7a | Apr 19 – May 3 |
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 Missouri, or the general guide to when to plant sweet corn.
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