When to plant Lettuce in Delaware

In spring, from Feb 15 – Apr 15 in Dover to Mar 15 – May 15 in Wilmington.

In fall, Aug 15 – Oct 1.

USDA's earliest safe spring and latest safe fall planting dates, matched to each place's average frost dates.

Leaf lettuce planting dates by place in Delaware
PlaceSpringFall
DoverFeb 15 – Apr 15Aug 15 – Oct 1
MiddletownMar 15 – May 15Aug 15 – Oct 1
MilfordMar 15 – May 15Aug 15 – Oct 1
NewarkMar 15 – May 15Aug 15 – Oct 1
SmyrnaFeb 15 – Apr 15Aug 15 – Oct 1
WilmingtonMar 15 – May 15Aug 15 – Oct 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 leaf lettuce.