When to plant sweet potato in Missouri
Missouri spans USDA zones 5b–7b, so the right time to plant sweet potato shifts by weeks across the state. The window to transplant seedlings outdoors runs from about April 16 in Sikeston to May 12 in Kirksville — below are local dates for 87 cities, each computed from its own frost dates.
| City | Zone | Last frost | First frost | Transplant out |
|---|---|---|---|---|
| Kansas City | 6b | April 4 | November 2 | April 25 – May 9 |
| St. Louis | 7a | April 1 | November 4 | April 22 – May 6 |
| Springfield | 7a | April 4 | October 27 | April 25 – May 9 |
| Columbia | 6b | April 5 | October 31 | April 26 – May 10 |
| Independence | 6b | April 10 | October 27 | May 1 – May 15 |
| Lee's Summit | 6b | April 7 | October 29 | April 28 – May 12 |
| O'Fallon | 6b | April 10 | October 26 | May 1 – May 15 |
| St. Charles | 6b | April 8 | October 29 | April 29 – May 13 |
Sweet Potato in Missouri: FAQ
When can I plant sweet potato in Missouri?
Across Missouri, the time to transplant sweet potato spans roughly April 16 in Sikeston to May 12 in Kirksville, each following that city's local frost dates.
Does the sweet potato planting date vary across Missouri?
Yes. Missouri publishes 87 cities with their own frost dates, so the right sweet potato planting window shifts by weeks between the warmest and coldest parts of the state — use your city's page for the exact dates.
How long does sweet potato take to grow in Missouri?
Sweet Potato takes about 90–120 days to reach harvest once planted — check that this fits inside your city's frost-free season on its place page.
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