Polk County, Minnesota
Local growing conditions for Polk County: the USDA hardiness zones found here, frost dates, and live weather for communities across the county. Based on 16 ZIP codes in our data.
Hardiness zones in Polk County
Polk County spans these USDA plant hardiness zones (by number of ZIP codes):
Local weather & frost dates
Open any community in Polk County for its live forecast, frost dates, and planting calendar:
Fosston 56542
Beltrami 56517
Climax 56523
Erskine 56535
Fertile 56540
McIntosh 56556
Nielsville 56568
Winger 56592
Gully 56646
Trail 56684
Crookston 56716
East Grand Forks 56721
Crookston 56722
Fisher 56723
Mentor 56736
Warren 56762
More for Minnesota
- Agriculture in Minnesota
- Frost dates across Minnesota
- 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.