Knox County, Ohio
Local growing conditions for Knox 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 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:
Bladensburg 43005
Centerburg 43011
Danville 43014
Fredericktown 43019
Gambier 43022
Howard 43028
Martinsburg 43037
Mount Vernon 43050
More for Ohio
- Agriculture in Ohio
- Frost dates across Ohio
- 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.