Maryland Climate Overview
Maryland's diverse geography from Garrett County mountains to the Eastern Shore creates varied growing conditions. The Chesapeake Bay moderates temperatures along the coast, extending the growing season. Baltimore and the DC suburbs offer long, productive seasons for container gardening.
Regional Climates
Baltimore Metro: Zone 7a-7b. 185-205 day season. Urban heat effect.
DC Suburbs: Zone 7a. 180-200 day season. Hot, humid summers.
Eastern Shore: Zone 7b-8a. 200-220 day season. Bay-moderated.
Western Maryland: Zone 6a-6b. 150-175 day season. Mountain climate.