When to plant Swiss chard in South Dakota
In spring, from Apr 15 – June 15 in Brandon to Apr 20 – June 15 in Watertown.
In fall, June 1 – July 5.
USDA's earliest safe spring and latest safe fall planting dates, matched to each place's average frost dates.
| Place | Spring | Fall |
|---|---|---|
| Aberdeen | Apr 20 – June 15 | June 1 – July 5 |
| Box Elder | Apr 20 – June 15 | June 1 – July 5 |
| Brandon | Apr 15 – June 15 | June 1 – July 20 |
| Brookings | Apr 20 – June 15 | June 1 – July 5 |
| Harrisburg | Apr 15 – June 15 | June 1 – July 5 |
| Huron | Apr 20 – June 15 | June 1 – July 5 |
| Mitchell | Apr 15 – June 15 | June 1 – July 20 |
| Pierre | Apr 20 – June 15 | June 1 – July 5 |
| Rapid City | Apr 15 – June 15 | June 1 – July 20 |
| Sioux Falls | Apr 15 – June 15 | June 1 – July 20 |
| Spearfish | Apr 20 – June 15 | June 1 – July 5 |
| Vermillion | Apr 15 – June 15 | June 1 – July 5 |
| Watertown | Apr 20 – June 15 | June 1 – July 5 |
| Yankton | Apr 15 – June 15 | June 1 – July 20 |
Planting dates: USDA Home and Garden Bulletin No. 9 (1967), tables 4 and 5. Frost dates: NOAA U.S. Climate Normals 1991–2020. “—” means the place's frost date is outside the table. The full USDA table for swiss chard.