Garden Zones

Almost every gardening book starts by looking at what plant hardiness zone you are in. This is important because it determines what plants will die in winter. That’s right – the hardiness zone is all about how cold tolerant a plant is and at what temperature its cell structure breaks down.

USDA Zones

The USDA publishes a map that divides the US down into 13 zones, each separated by 10°F. In more detailed maps, those zones are split into sub-zones separated by 5°F. The map was last updated in 2012 and there are websites where you plug in your zip code and your zone will appear.

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