San Diego County, California
Local growing conditions for San Diego County: the USDA hardiness zones found here, frost dates, and live weather for communities across the county. Based on 115 ZIP codes in our data.
Hardiness zones in San Diego County
San Diego County spans these USDA plant hardiness zones (by number of ZIP codes):
Local weather & frost dates
Open any community in San Diego County for its live forecast, frost dates, and planting calendar:
Imperial Beach 91932
Coronado 92135
Alpine 91901
Bonita 91902
Boulevard 91905
Campo 91906
Chula Vista 91910
Chula Vista 91911
Chula Vista 91913
Chula Vista 91914
Chula Vista 91915
Descanso 91916
Jamul 91917
Descanso 91931
Jacumba 91934
Jamul 91935
Casa de Oro-Mount Helix 91941
La Mesa 91942
Lemon Grove 91945
Pine Valley 91948
National City 91950
Pine Valley 91962
Potrero 91963
La Presa 91977
More for California
- Agriculture in California
- Frost dates across California
- 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.