When to plant Peppers in District of Columbia

In spring, Apr 15 – June 1 in Washington.

In fall, June 1 – Aug 1 in Washington.

Dates are for setting out plants. USDA's earliest safe spring and latest safe fall planting dates, matched to each place's average frost dates.

Peppers planting dates by place in District of Columbia
PlaceSpringFall
WashingtonApr 15 – June 1June 1 – Aug 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 peppers.