Deconstruct SunHardiness Zone 12b: Temperature, States & Cities
In USDA zone 12b, the coldest night of a typical winter falls between 55 and 60 °F (12.8 to 15.6 °C).
average annual extreme minimum
Where is zone 12b?
On the 2023 USDA map, zone 12b appears in Hawaii, Puerto Rico.
Cities in zone 12b
Gardening in zone 12b
Pick perennials, shrubs and trees labeled for zone 12b or a lower number. Then match the light: every plant tag also lists full sun, part sun or shade, and that depends on the exact spot, not the zone.
Check your zone
Zone checked. Now measure the sun.
Deconstruct Sun shows how many hours of direct sun one exact spot gets, today and in every season. Free on iPhone.
Questions
What is the temperature range for zone 12b?
In zone 12b, the average coldest winter night is 55 to 60 °F (12.8 to 15.6 °C). That is the average of each year’s lowest temperature from 1991 to 2020.
What is the difference between zone 12b and 12a?
Both are part of zone 12. The “a” half is 5 °F colder than the “b” half. Zone 12a averages 50 to 55 °F and zone 12b averages 55 to 60 °F.
Can I grow zone 13a plants in zone 12b?
A plant rated for a warmer zone may survive a mild winter, but one hard freeze can kill it. Choose plants rated for your zone or colder for permanent plantings, and treat warmer-zone plants as annuals or grow them in pots you can move.
This is not the official USDA Plant Hardiness Zone Map. Zones are derived from the official 2023 dataset, resampled to about 2 km.