A hardiness zone is a geographic area with a similar average minimum temperature. The map is based on the average annual ...
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However, average minimum temperatures vary widely from south to north Wisconsin, meaning plants that may do well in Milwaukee ...
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.
The USDA bases its plant zone maps on average minimum temperature so people in each zone know which plants can best withstand their local weather. For example, a tropical plant that needs 40 ...
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