The 2023 map includes data measured at weather stations from 1991 to 2020. Notably, the 2023 map for Alaska is “warmer” than the 2012 version.

The USDA Plant Hardiness Zone Map consists of 13 individual zones that take in all of the contiguous United States, plus Alaska, Hawaii, and Puerto Rico. The first zone lies at the coldest and ...

The map of the US is divided into zones, separated by ten degrees. It starts with 1a (Alaska) and goes all the way up to 13b (Puerto Rico), and the mainland U.S. tends to live between zones 5 and 10.

Well, there is now a new, 2023 Plant Hardiness Zone map. It again shows improvement. It now turns out that most of us who garden in Alaska do so in Zone 5b.

For the first time since 2012, the U.S. Department of Agriculture has released an updated plant hardiness zone map. The map is based on the average annual extreme minimum temperature over a 30 ...

2023 USDA Plant Hardiness Zone Map (Courtesy USDA) Most urgently, the 2023 PHZM reveals that Alaska is “warmer” when compared to the 2012 map, a USDA press release stated.

The 1990s map, developed by the National Arbor Day Foundation in cooperation with the USDA, refined hardiness zones that were last updated in the 1960s and incorporated more sophisticated technology.

So in my now zone 7a Kentucky garden (it was 6b in the last version of the map) there’s nothing that says my plants won’t encounter an occasional -3 or -5 or -8, as was the case in the late ...

The USDA map divides the United States into 13 plant hardiness zones based on each location’s annual extreme minimum temperature. Each zone spans a 10-degree temperature range.