When to plant sweet potato in Minnesota
Minnesota spans USDA zones 3b–5a, so the right time to plant sweet potato shifts by weeks across the state. The window to transplant seedlings outdoors runs from about May 12 in Winona to June 26 in Hibbing — below are local dates for 102 cities, each computed from its own frost dates.
| City | Zone | Last frost | First frost | Transplant out |
|---|---|---|---|---|
| Minneapolis | 5a | April 23 | October 16 | May 14 – May 28 |
| St. Paul | 5a | April 24 | October 16 | May 15 – May 29 |
| Rochester | 4b | April 30 | October 6 | May 21 – June 4 |
| Bloomington | 5a | April 23 | October 18 | May 14 – May 28 |
| Duluth | 4b | May 14 | October 12 | June 4 – June 18 |
| Brooklyn Park | 5a | April 30 | October 8 | May 21 – June 4 |
| Plymouth | 5a | April 29 | October 12 | May 20 – June 3 |
| Woodbury | 5a | April 26 | October 12 | May 17 – May 31 |
Sweet Potato in Minnesota: FAQ
When can I plant sweet potato in Minnesota?
Across Minnesota, the time to transplant sweet potato spans roughly May 12 in Winona to June 26 in Hibbing, each following that city's local frost dates.
Does the sweet potato planting date vary across Minnesota?
Yes. Minnesota publishes 102 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 Minnesota?
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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