Northumberland County, Virginia
Local growing conditions for Northumberland County: the USDA hardiness zones found here, frost dates, and live weather for communities across the county. Based on 6 ZIP codes in our data.
Hardiness zones in Northumberland County
Northumberland County spans these USDA plant hardiness zones (by number of ZIP codes):
Local weather & frost dates
Open any community in Northumberland County for its live forecast, frost dates, and planting calendar:
Heathsville 22432
Heathsville 22435
Heathsville 22473
Kilmarnock 22482
Heathsville 22511
Heathsville 22539
More for Virginia
- Agriculture in Virginia
- Frost dates across Virginia
- 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.