When to plant Radishes in Delaware

In spring, from Feb 15 – May 1 in Dover to Mar 1 – May 1 in Wilmington.

In fall, Aug 15 – Oct 15.

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

Radishes planting dates by place in Delaware
PlaceSpringFall
DoverFeb 15 – May 1Aug 15 – Oct 15
MiddletownMar 1 – May 1Aug 15 – Oct 15
MilfordMar 1 – May 1Aug 15 – Oct 15
NewarkMar 1 – May 1Aug 15 – Oct 15
SmyrnaFeb 15 – May 1Aug 15 – Oct 15
WilmingtonMar 1 – May 1Aug 15 – 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 radishes.