Marion County, Iowa
Local growing conditions for Marion County: the USDA hardiness zones found here, frost dates, and live weather for communities across the county. Based on 12 ZIP codes in our data.
Hardiness zones in Marion County
Marion County spans these USDA plant hardiness zones (by number of ZIP codes):
Local weather & frost dates
Open any community in Marion County for its live forecast, frost dates, and planting calendar:
Bussey 50044
Melcher-Dallas 50057
Melcher-Dallas 50062
Marysville 50116
Harvey 50119
Knoxville 50138
Melcher-Dallas 50163
Monroe 50214
Pella 50219
Pleasantville 50225
Swan 50252
Bussey 50256
More for Iowa
- Agriculture in Iowa
- Frost dates across Iowa
- 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.