Knox County, Maine
Local growing conditions for Knox County: the USDA hardiness zones found here, frost dates, and live weather for communities across the county. Based on 19 ZIP codes in our data.
Hardiness zones in Knox County
Knox County spans these USDA plant hardiness zones (by number of ZIP codes):
Local weather & frost dates
Open any community in Knox County for its live forecast, frost dates, and planting calendar:
Rockland 04856
Waldoboro 04547
Thomaston 04563
Waldoboro 04574
Rockland 04841
Camden 04843
Camden 04847
Rockland 04851
Camden 04853
Rockland 04854
Waldoboro 04855
Thomaston 04858
Thomaston 04859
Thomaston 04860
Rockland 04861
Rockland 04862
Rockland 04863
Rockland 04864
More for Maine
- Agriculture in Maine
- Frost dates across Maine
- 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.