When to plant Leeks in Maine
In spring, from Mar 15 – Apr 15 in Auburn to May 1 – 20 in Sanford.
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 |
|---|---|
| Auburn | Mar 15 – Apr 15 |
| Augusta | Apr 1 – May 1 |
| Bangor | Apr 1 – May 1 |
| Biddeford | Apr 15 – May 15 |
| Lewiston | Mar 15 – Apr 15 |
| Portland | Apr 1 – May 1 |
| Saco | Apr 1 – May 1 |
| Sanford | May 1 – 20 |
| South Portland | Apr 1 – May 1 |
| Waterville | Apr 1 – May 1 |
| Westbrook | 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.