When to plant Leeks in Delaware
In spring, from Feb 15 – Mar 15 in Dover to Mar 1 – Apr 1 in Wilmington.
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 |
|---|---|
| Dover | Feb 15 – Mar 15 |
| Middletown | Mar 1 – Apr 1 |
| Milford | Mar 1 – Apr 1 |
| Newark | Mar 1 – Apr 1 |
| Smyrna | Feb 15 – Mar 15 |
| Wilmington | Mar 1 – Apr 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.