Frederick County, Maryland
Local growing conditions for Frederick County: the USDA hardiness zones found here, frost dates, and live weather for communities across the county. Based on 28 ZIP codes in our data.
Hardiness zones in Frederick County
Frederick County spans these USDA plant hardiness zones (by number of ZIP codes):
Local weather & frost dates
Open any community in Frederick County for its live forecast, frost dates, and planting calendar:
Frederick 21701
Frederick 21702
Ballenger Creek 21703
Urbana 21704
Frederick 21705
Buckeystown 21710
Braddock Heights 21714
Brunswick 21716
Buckeystown 21717
Burkittsville 21718
Emmitsburg 21727
Urbana 21754
Jefferson 21755
Garretts Mill 21758
Libertytown 21762
Middletown 21769
Green Valley 21770
Mount Airy 21771
Myersville 21773
Linganore 21774
Point of Rocks 21777
Graceham 21778
Sabillasville 21780
Thurmont 21788
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.