Plant labels, catalogs, books and websites all classify plants according to the USDA hardiness zones. On the new map, Chicago is in Zone 6 rather than the slightly colder Zone 5.

The USDA divides the United States into seven planting regions, known as hardiness zones, which were most recently updated in 2023.The maps below show these planting regions.

INDIANA, USA — Indiana is now mostly a Zone 6 state (both a and b) according to the United States Department of Agriculture's latest plant hardiness zone map. It was updated in November 2023, so this ...

Milwaukee falls into zone 6a for plant hardiness, which is the higher end of the spectrum in Wisconsin. According to Breck's , a mail-order plant company, the following spring-planted bulbs are ...