Maryland frost dates

Across Maryland, the average last spring frost is around April 14 and the average first fall frost around October 20 — roughly 189 frost-free days. USDA zones 5b, 6a, 6b, 7a, 7b, 8a.

Risk you accept	Last spring frost by	First fall frost by
Cautious (~10%)	April 28	October 6
Average (~50%)	April 14	October 20
Gambler (~90%)	March 31	November 3

Maryland spans a wide range of elevations and climates — your town’s dates can differ from the state average by two weeks or more. Look up your exact ZIP.

→ Turn these into sowing dates with the Maryland planting calendar, or look up an exact ZIP code.

Statewide average from NOAA/NCEI freeze normals. Cautious/gambler dates are about two weeks either side of the average.