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Winter hardiness zones
A winter hardiness zone, also known as a USDA zone, is a classification system used to categorise climatic conditions based on winter temperatures (susceptibility to frost). These zones range from 1a (coldest) to 13b (mildest). These winter hardiness zones can help you find the right plants and trees that are sufficiently hardy for your region.
The winter temperatures the plant or tree can withstand is noted with each product. See the overview of winter hardiness zones here:
USDA Hardness zones in °C
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