USDA Plant Hardiness Zone
Zone 13b Frost Dates & Planting Calendar
13 ZIP codes across 1 states fall in zone 13b.
- Zone
- 13b
- Average Annual Low
- 65 to 70°F
- Typical Growing Season
- 365 days
- ZIP Codes
- 13
What zone 13b actually tells you
A hardiness zone describes one thing: the average coldest night of the year, which in zone 13b falls between 65 to 70°F. It answers whether a perennial will survive the winter — not when to plant in spring.
Frost dates answer the planting question, and they vary widely inside a single zone. Zone 13b spans 1 states, and a coastal ZIP can differ from an inland one by three weeks despite sharing the zone. Pick your own ZIP code below rather than planting by zone alone.