Douglas County, Colorado
Local growing conditions for Douglas 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 Douglas County
Douglas County spans these USDA plant hardiness zones (by number of ZIP codes):
Local weather & frost dates
Open any community in Douglas County for its live forecast, frost dates, and planting calendar:
Castle Rock 80104
Castle Pines 80108
Castle Rock 80109
Franktown 80116
Larkspur 80118
Lone Tree 80124
Sterling Ranch 80125
Highlands Ranch 80126
Highlands Ranch 80129
Highlands Ranch 80130
Louviers 80131
Parker 80134
Westcreek 80135
Parker 80138
More for Colorado
- Agriculture in Colorado
- Frost dates across Colorado
- 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.