Sullivan County, Tennessee
Local growing conditions for Sullivan County: the USDA hardiness zones found here, frost dates, and live weather for communities across the county. Based on 8 ZIP codes in our data.
Hardiness zones in Sullivan County
Sullivan County spans these USDA plant hardiness zones (by number of ZIP codes):
Local weather & frost dates
Open any community in Sullivan County for its live forecast, frost dates, and planting calendar:
Blountville 37617
Bluff City 37618
Bristol 37620
Kingsport 37660
Kingsport 37663
Kingsport 37664
Kingsport 37665
Johnson City 37686
More for Tennessee
- Agriculture in Tennessee
- Frost dates across Tennessee
- 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.