Seneca County, Ohio
Local growing conditions for Seneca County: the USDA hardiness zones found here, frost dates, and live weather for communities across the county. Based on 14 ZIP codes in our data.
Hardiness zones in Seneca County
Seneca County spans these USDA plant hardiness zones (by number of ZIP codes):
Local weather & frost dates
Open any community in Seneca County for its live forecast, frost dates, and planting calendar:
Tiffin 44883
New Riegel 44802
Attica 44807
Bascom 44809
Bettsville 44815
Bloomville 44818
Flat Rock 44828
Fostoria 44830
Green Springs 44836
Kansas 44841
McCutchenville 44844
New Riegel 44853
Old Fort 44861
Republic 44867
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.