Mills County, Iowa
Local growing conditions for Mills County: the USDA hardiness zones found here, frost dates, and live weather for communities across the county. Based on 7 ZIP codes in our data.
Hardiness zones in Mills County
Mills County spans these USDA plant hardiness zones (by number of ZIP codes):
Local weather & frost dates
Open any community in Mills County for its live forecast, frost dates, and planting calendar:
Glenwood 51534
Hastings 51540
Henderson 51541
Malvern 51551
Mineola 51554
Pacific Junction 51561
Silver City 51571
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.