PORTLAND, Ore. (KOIN) — Plant enthusiasts and gardeners alike should be aware of the changes made to the USDA’s plant hardiness zones. The hardiness zone update by the USDA is the first adjustment in ...
The United States is divided into 13 different plant hardiness zones, each with "A" and "B" subdivisions. This is a number assigned to a plant that tells you how cold of a temperature the plant can ...
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