When to plant orach in South Dakota
South Dakota spans USDA zones 4a–5b, so the right time to plant orach 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 10 |
| Rapid City | 5b | May 3 | October 8 | April 19 – May 17 |
| Aberdeen | 4a | May 8 | September 29 | April 24 – May 22 |
| Brookings | 4b | May 6 | October 1 | April 22 – May 20 |
| Watertown | 4b | May 7 | September 30 | April 23 – May 21 |
| Mitchell | 5a | May 2 | October 6 | April 18 – May 16 |
| Yankton | 5a | April 27 | October 11 | April 13 – May 11 |
| Huron | 4b | May 6 | October 2 | April 22 – May 20 |
Orach in South Dakota: FAQ
When can I plant orach in South Dakota?
Across South Dakota, the time to direct-sow orach spans roughly April 12 in Sioux Falls to April 28 in Spearfish, each following that city's local frost dates.
Does the orach planting date vary across South Dakota?
Yes. South Dakota publishes 13 cities with their own frost dates, so the right orach 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 orach take to grow in South Dakota?
Orach takes about 40–60 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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