Calvert County, Maryland
Local growing conditions for Calvert County: the USDA hardiness zones found here, frost dates, and live weather for communities across the county. Based on 12 ZIP codes in our data.
Hardiness zones in Calvert County
Calvert County spans these USDA plant hardiness zones (by number of ZIP codes):
Local weather & frost dates
Open any community in Calvert County for its live forecast, frost dates, and planting calendar:
Solomons 20688
Broomes Island 20615
Solomons 20629
Huntingtown 20639
Lusby 20657
St. Leonard 20676
Prince Frederick 20678
Broomes Island 20685
Chesapeake Beach 20689
Chesapeake Beach 20732
Owings 20736
Dunkirk 20754
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.