Zone 12b
In USDA zone 12b the coldest night of an average winter reaches 55 to 60 °F (12.8 to 15.6 °C). 136 ZIP codes (0.3% of all) are in this zone.
Frost dates vary within zone 12b
For the middle half of zone-12b ZIP codes the last spring frost falls between Apr 12 and Apr 12, and the first fall frost between Dec 1 and Dec 1. The zone measures winter cold, not season length: humid Eastern and dry Western towns in the same zone can be weeks apart. Use your ZIP code for a planting date.
States with zone 12b
Cities mostly in zone 12b
← Zone 12a (colder)Zone 13a (warmer) →
Questions
What is the temperature range of zone 12b?
Zone 12b covers places where the coldest night of an average winter (the annual extreme minimum averaged over 1991–2020) is 55 to 60 °F, or 12.8 to 15.6 °C.
When is the last frost in zone 12b?
Across ZIP codes in zone 12b, the median last spring frost falls between Apr 12 and Apr 12 for the middle half of places. Zone alone doesn't set the frost date — check your ZIP code.
Which states have zone 12b?
Zone 12b occurs in 2 states; the most ZIP codes are in Hawaii, Puerto Rico.
What can I grow in zone 12b?
Perennials, shrubs and trees labeled hardy to zone 12b or a lower (colder) number should survive a typical winter. Annual vegetables depend on frost dates rather than zone.
Not the official USDA Plant Hardiness Zone Map. Zones come from the 2023 USDA hardiness-zone data by the PRISM Group, Oregon State University; we re-mapped and recolored them. The official map is at planthardiness.ars.usda.gov.