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.
What system is that? Tried googling it and all I got was rock climbing despite using the word climate lol
South florida
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.
I figured it was “global climate at 9+ billion population”, ie everything is on fire
usda zones I assume
Google “planting zones” the first results are maps.
Seems to be an American thing tbh. I was never going to find it without context or seen explanation lol