Also good to plant in early spring are hardy plants, such as perennials – think asters, delphinium and pansies – as well as shrubs, trees and ... Agriculture's Plant Hardiness Zone map.) ...

A hardiness zone is a geographic area with a similar average minimum temperature. The map is based on the average annual extreme minimum temperature, so people in those areas know which plants can ...

However, average minimum temperatures vary widely from south to north Wisconsin, meaning plants that may do well in Milwaukee may not be as suited to cities like Superior. Plant hardiness zones in ...

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 ...

The U.S. Department of Agriculture (USDA) has a Plant Hardiness Zone Map that divides the U.S. into 13 different zones, which helps gardeners choose plants that can survive in their respective ...