But the newest update to the plant hardiness map, ... Illinois now has six zones, with 12 sub-zones, ranging from zone 5a in northwestern Illinois to the newly added 7b zone in southern counties.

The 2023 USDA Plant Hardiness Zone map, which was generated based on weather data gathered from 1991 to 2020, indicates that about half the United States moved into a warmer zone.

Illinois's plant hardiness zones are changing. Here's why that's alarming. Illinois State Climatologist Trent Ford joins The Current to break down a stark reality: the types of plants grown in ...

The new USDA plant hardiness zone map moves all of Chicago and most of central Illinois into the warmer Zone 6, but gardeners are still wise to be cautious because the weather continues to be ...

Heat domes, atmospheric rivers, bomb cyclones, and polar vortex—you’re not crazy, the weather is. And last week, the USDA confirmed it by releasing an updated climate zone map for 2023. For ...

Plant hardiness zone map an important, but not tell-all tool for gardeners The 2023 map is about 2.5 degrees warmer than the 2012 map, translating into about half of the country shifting to a ...

The new Plant Hardiness Zone Map reveals that about half of the country shifted to the next warmer half zone, when compared to the previous map, compiled in 2012.

The Plant Hardiness Zone Map is based on the average annual extreme minimum winter temperature, displayed as 10-degree F zones ranging from zone 1 (coldest) to zone 13 (warmest), the USDA notes.

Compared to the 2012 map, the 2023 version shows that roughly half of the country shifted to the next warmer half zone, and the other half of U.S. remained in the same half zone.. According to the ...

The Plant Hardiness Zones detailed in the new map define 13 distinct zones across the U.S. and its territories. These zones are delineated based on the average annual lowest minimum temperature.