When to plant swiss chard in South Dakota
South Dakota spans USDA zones 4a–5b, so the right time to plant swiss chard shifts by weeks across the state. The window to sow seed directly outdoors runs from about April 12 in Sioux Falls to April 28 in Spearfish — below are local dates for 13 cities, each computed from its own frost dates.
| City | Zone | Last frost | First frost | Direct sow |
|---|---|---|---|---|
| Sioux Falls | 5a | April 26 | October 13 | April 12 – May 24 |
| Rapid City | 5b | May 3 | October 8 | April 19 – May 31 |
| Aberdeen | 4a | May 8 | September 29 | April 24 – June 5 |
| Brookings | 4b | May 6 | October 1 | April 22 – June 3 |
| Watertown | 4b | May 7 | September 30 | April 23 – June 4 |
| Mitchell | 5a | May 2 | October 6 | April 18 – May 30 |
| Yankton | 5a | April 27 | October 11 | April 13 – May 25 |
| Huron | 4b | May 6 | October 2 | April 22 – June 3 |
Swiss Chard in South Dakota: FAQ
When can I plant swiss chard in South Dakota?
Across South Dakota, the time to direct-sow swiss chard spans roughly April 12 in Sioux Falls to April 28 in Spearfish, each following that city's local frost dates.
Does the swiss chard planting date vary across South Dakota?
Yes. South Dakota publishes 13 cities with their own frost dates, so the right swiss chard 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 swiss chard take to grow in South Dakota?
Swiss Chard takes about 50–60 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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