USDA Agricultural zones. They’re based on the lowest average temp the climate can get. 1 is coldest, 13 is hottest.
9b means almost never freezes except for a few nights a year and it thaws out when the sun hits. Some perennial tropical plants can be grown there as frost tender annuals.
USDA Agricultural zones. They’re based on the lowest average temp the climate can get. 1 is coldest, 13 is hottest.
9b means almost never freezes except for a few nights a year and it thaws out when the sun hits. Some perennial tropical plants can be grown there as frost tender annuals.
I’m just north of San Francisco in 9b.