When to plant Leeks in South Dakota
In spring, from Apr 1 – May 1 in Brandon to Apr 15 – May 15 in Watertown.
In fall: USDA's 1967 table lists leeks as generally spring-planted in every place here. Newer advice from your state's extension service may differ.
USDA's earliest safe spring and latest safe fall planting dates, matched to each place's average frost dates.
| Place | Spring |
|---|---|
| Aberdeen | Apr 15 – May 15 |
| Box Elder | Apr 15 – May 15 |
| Brandon | Apr 1 – May 1 |
| Brookings | Apr 15 – May 15 |
| Harrisburg | Apr 1 – May 1 |
| Huron | Apr 15 – May 15 |
| Mitchell | Apr 1 – May 1 |
| Pierre | Apr 15 – May 15 |
| Rapid City | Apr 1 – May 1 |
| Sioux Falls | Apr 1 – May 1 |
| Spearfish | Apr 15 – May 15 |
| Vermillion | Apr 1 – May 1 |
| Watertown | Apr 15 – May 15 |
| Yankton | Apr 1 – May 1 |
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 leeks.