When to plant gai lan (chinese broccoli) in South Dakota
South Dakota spans USDA zones 4a–5b, so the right time to plant gai lan (chinese broccoli) shifts by weeks across the state. The window to sow seed directly outdoors runs from about April 5 in Sioux Falls to April 21 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 5 – May 10 |
| Rapid City | 5b | May 3 | October 8 | April 12 – May 17 |
| Aberdeen | 4a | May 8 | September 29 | April 17 – May 22 |
| Brookings | 4b | May 6 | October 1 | April 15 – May 20 |
| Watertown | 4b | May 7 | September 30 | April 16 – May 21 |
| Mitchell | 5a | May 2 | October 6 | April 11 – May 16 |
| Yankton | 5a | April 27 | October 11 | April 6 – May 11 |
| Huron | 4b | May 6 | October 2 | April 15 – May 20 |
Gai Lan (Chinese Broccoli) in South Dakota: FAQ
When can I plant gai lan (chinese broccoli) in South Dakota?
Across South Dakota, the time to direct-sow gai lan (chinese broccoli) spans roughly April 5 in Sioux Falls to April 21 in Spearfish, each following that city's local frost dates.
Does the gai lan (chinese broccoli) planting date vary across South Dakota?
Yes. South Dakota publishes 13 cities with their own frost dates, so the right gai lan (chinese broccoli) 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 gai lan (chinese broccoli) take to grow in South Dakota?
Gai Lan (Chinese Broccoli) takes about 50–70 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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