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Here's How to Use the USDA's Plant Hardiness Zone Map
Interestingly, the first edition of the plant hardiness zone map was created by Arnold Arboretum at Harvard in 1927! And ...
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New USDA ‘plant hardiness’ zoning map may help determine life or death of your perennials
Plant growers and gardeners in the U.S. have new guidance for which perennial plants could flourish, or perish in their area. The U.S. Department of Agriculture published a new version of its well ...