When to plant Onions in District of Columbia
In spring, Feb 15 – Mar 15 in Washington.
In fall, Sept 1 – Oct 15 in Washington.
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 | Fall |
|---|---|---|
| Washington | Feb 15 – Mar 15 | Sept 1 – Oct 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.