When to plant Onions in North Dakota
In spring, from Apr 1 – May 1 in Fargo to Apr 20 – May 15 in Williston.
In fall: USDA's 1967 table lists onion plants as generally spring-planted in every place here. Newer advice from your state's extension service may differ.
Dates are for setting out plants. USDA's earliest safe spring and latest safe fall planting dates, matched to each place's average frost dates.
| Place | Spring |
|---|---|
| Bismarck | Apr 10 – May 1 |
| Dickinson | Apr 20 – May 15 |
| Fargo | Apr 1 – May 1 |
| Grand Forks | Apr 10 – May 1 |
| Jamestown | Apr 10 – May 1 |
| Mandan | Apr 10 – May 1 |
| Minot | Apr 10 – May 1 |
| West Fargo | Apr 1 – May 1 |
| Williston | Apr 20 – May 15 |
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 onion plants.