The USDA Plant Hardiness Zone Map is a standard that is used to understand which perennials are most likely to thrive in a specific location based on the average annual extreme minimum winter temperature. Gardeners often follow this as their planting zone and search for the planting calendar by their zone name.

Using this online tool, you can find your hardiness zone by providing your zip code in the box above and click/tap on the green button with text “Find Zone” on it.