When to plant Green beans in Maryland

In spring, from Mar 15 – May 25 in Baltimore to Apr 25 – June 30 in Westminster.

In fall, July 1 – Aug 15.

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

Snap beans planting dates by place in Maryland
PlaceSpringFall
AberdeenApr 10 – June 30July 1 – Aug 15
AnnapolisApr 1 – June 1July 1 – Sept 1
BaltimoreMar 15 – May 25July 1 – Sept 10
Bel AirApr 10 – June 30July 1 – Aug 15
BowieApr 25 – June 30July 1 – Aug 1
CambridgeApr 1 – June 1July 1 – Sept 1
College ParkApr 10 – June 30July 1 – Aug 15
CumberlandApr 10 – June 30July 1 – Aug 1
EastonApr 1 – June 1July 1 – Sept 1
ElktonApr 10 – June 30July 1 – Aug 15
FrederickApr 1 – June 1July 1 – Sept 1
GaithersburgApr 1 – June 1July 1 – Sept 1
GreenbeltApr 10 – June 30July 1 – Aug 15
HagerstownApr 10 – June 30July 1 – Aug 15
Havre de GraceApr 10 – June 30July 1 – Aug 15
HyattsvilleApr 1 – June 1July 1 – Sept 1
La PlataApr 25 – June 30July 1 – Aug 15
LaurelApr 10 – June 30July 1 – Sept 1
New CarrolltonApr 25 – June 30July 1 – Aug 1
RockvilleApr 1 – June 1July 1 – Sept 1
SalisburyApr 1 – June 1July 1 – Sept 1
Takoma ParkApr 1 – June 1July 1 – Sept 1
WestminsterApr 25 – June 30July 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 snap beans.