When to plant garlic in South Dakota
South Dakota spans USDA zones 4a–5b, so the right time to plant garlic shifts by weeks across the state. The window to plant for fall/overwintering runs from about September 1 in Aberdeen to September 15 in Sioux Falls — below are local dates for 13 cities, each computed from its own frost dates.
| City | Zone | Last frost | First frost | Fall-plant |
|---|---|---|---|---|
| Sioux Falls | 5a | April 26 | October 13 | September 15 – September 29 |
| Rapid City | 5b | May 3 | October 8 | September 10 – September 24 |
| Aberdeen | 4a | May 8 | September 29 | September 1 – September 15 |
| Brookings | 4b | May 6 | October 1 | September 3 – September 17 |
| Watertown | 4b | May 7 | September 30 | September 2 – September 16 |
| Mitchell | 5a | May 2 | October 6 | September 8 – September 22 |
| Yankton | 5a | April 27 | October 11 | September 13 – September 27 |
| Huron | 4b | May 6 | October 2 | September 4 – September 18 |
Garlic in South Dakota: FAQ
When can I plant garlic in South Dakota?
Across South Dakota, the time to fall-plant garlic spans roughly September 1 in Aberdeen to September 15 in Sioux Falls, each following that city's local frost dates.
Does the garlic planting date vary across South Dakota?
Yes. South Dakota publishes 13 cities with their own frost dates, so the right garlic planting window shifts by weeks between the warmest and coldest parts of the state — use your city's page for the exact dates.
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