Onslow County, North Carolina
Local growing conditions for Onslow County: the USDA hardiness zones found here, frost dates, and live weather for communities across the county. Based on 13 ZIP codes in our data.
Hardiness zones in Onslow County
Onslow County spans these USDA plant hardiness zones (by number of ZIP codes):
Local weather & frost dates
Open any community in Onslow County for its live forecast, frost dates, and planting calendar:
Holly Ridge 28445
Jacksonville 28454
North Topsail Beach 28460
Swansboro 28539
Jacksonville 28540
Jacksonville 28542
Jacksonville 28543
Piney Green 28544
Jacksonville 28546
Jacksonville 28547
Maysville 28555
Richlands 28574
Swansboro 28582
More for North Carolina
- Agriculture in North Carolina
- Frost dates across North Carolina
- USDA hardiness zones explained
- Planting calendar by ZIP code
← All counties in North Carolina
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.