The USDA Plant Hardiness Zone Map is the standard by which gardeners and growers can determine which perennial plants are most likely to thrive at a location. The map is based on the average annual extreme minimum winter temperature, displayed as 10-degree F zones and 5-degree F half zones.

The overlay of colored zones on the map provides a convenient tool for understanding and comparing plant cold-hardiness across the United States and can facilitate the selection of appropriate perennial plants based on their observed performance in other regions of the country.

This page allows you to find and download state, regional, and national Plant Hardiness Zone Maps at various resolutions. Click on the map below to download state/territory maps or scroll down to find regional and national maps for download.

The two new zones will provide a way to share information about differences in cold sensitivity of tropical ornamental plants and could help gardeners decide when to bring tropical plants indoors from a deck or patio as the temperature cools.

The 2023 USDA Plant Hardiness Zone Map helps gardeners determine which plants are most likely to thrive based on average annual minimum winter temperatures.