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New USDA ‘plant hardiness’ zoning map may help determine life or death of your perennials
The U.S. Department of Agriculture published a new version of its well-known Plant Hardiness ... zones, with 5 degrees of difference. Arizona spans across zones 5 through 10. The new map, created ...
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U.S. changes hardiness zone map for gardeners to keep pace with climate change
The U.S. Department of Agriculture’s ”plant hardiness zone map" was updated ... seasons at the University of Arizona and was not involved in creating the map. “When we don't have as cold ...