Mahoning County, Ohio
Local growing conditions for Mahoning 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 Mahoning County
Mahoning County spans these USDA plant hardiness zones (by number of ZIP codes):
Local weather & frost dates
Open any community in Mahoning County for its live forecast, frost dates, and planting calendar:
Lake Milton 44401
Campbell 44405
Canfield 44406
Lake Milton 44429
Lowellville 44436
New Middletown 44442
New Springfield 44443
Sebring 44449
Lordstown 44451
North Lima 44452
Petersburg 44454
Struthers 44471
Youngstown 44502
Youngstown 44503
Youngstown 44504
Youngstown 44505
Youngstown 44506
Youngstown 44507
Youngstown 44509
Youngstown 44510
Youngstown 44511
Youngstown 44512
Poland 44514
Austintown 44515
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.