When to plant Lima beans in District of Columbia

In spring, Apr 15 – June 20 in Washington.

In fall, July 1 – Aug 15 in Washington.

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

Lima beans planting dates by place in District of Columbia
PlaceSpringFall
WashingtonApr 15 – June 20July 1 – Aug 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 lima beans.