Baltimore County, Maryland
Local growing conditions for Baltimore County: the USDA hardiness zones found here, frost dates, and live weather for communities across the county. Based on 44 ZIP codes in our data.
Hardiness zones in Baltimore County
Baltimore County spans these USDA plant hardiness zones (by number of ZIP codes):
Local weather & frost dates
Open any community in Baltimore County for its live forecast, frost dates, and planting calendar:
Fallston 21013
Cockeysville 21023
Cockeysville 21030
Cockeysville 21031
Kingsville 21051
Edgemere 21052
New Freedom 21053
Carney 21057
Reisterstown 21071
Kingsville 21082
Kingsville 21087
Mays Chapel 21093
New Freedom 21105
Jarrettsville 21111
Owings Mills 21117
New Freedom 21120
Honeygo 21128
Cockeysville 21131
Randallstown 21133
Reisterstown 21136
Cockeysville 21152
Pikesville 21153
Hampstead 21155
Kingsville 21156
More for Maryland
- Agriculture in Maryland
- Frost dates across Maryland
- USDA hardiness zones explained
- Planting calendar by ZIP code
County growing conditions are compiled from our ZIP-code database, USDA hardiness-zone data, and NOAA climate normals. Conditions vary within a county by elevation and local microclimate. Page updated Aug 4, 2026.