Caroline County, Maryland
Local growing conditions for Caroline County: the USDA hardiness zones found here, frost dates, and live weather for communities across the county. Based on 8 ZIP codes in our data.
Hardiness zones in Caroline County
Caroline County spans these USDA plant hardiness zones (by number of ZIP codes):
Local weather & frost dates
Open any community in Caroline County for its live forecast, frost dates, and planting calendar:
Denton 21629
Federalsburg 21632
Goldsboro 21636
Greensboro 21639
Goldsboro 21640
Hillsboro 21641
Preston 21655
Ridgely 21660
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.