USDA Zone Map

Browse USDA Zones By State

Alabama Alaska Arizona Arkansas California
Colorado Connecticut Delaware Florida Georgia
Hawaii Idaho Illinois Indiana Iowa
Kansas Kentucky Louisiana Maine Maryland
Massachusetts Michigan Minnesota Mississippi Missouri
Montana Nebraska Nevada New Hampshire New Jersey
New Mexico New York North Carolina North Dakota Ohio
Oklahoma Oregon Pennsylvania Rhode Island South Carolina
South Dakota Tennessee Texas Utah Vermont
Virginia Washington West Virginia Wisconsin Wyoming
District of Columbia


Zone 1 Below -50*F
Zone 2 -50° to -35°
Zone 3 -35° to -20°
Zone 4 -20° to -10°
Zone 5 -10° to -5°
Zone 6 -5° to 5°
Zone 7 5° to 10°
Zone 8 10° to 20°
Zone 9 20° to 30°
Zone 10 30° to 40°

Most gardeners are familiar with the U.S. Department of Agriculture's Plant Hardiness Zone Map. First published in 1960 and updated in 1990, this map is based on average annual minimum temperatures recorded throughout North America. By using the map to find the zone in which they live, gardeners are able to determine what plants will "winter over" in their garden because they can withstand these average minimum temperatures.

Although these zones are useful as an indicator of a plant's likelihood for survival in a given area, many factors, including soil type and fertility, soil moisture and drainage, humidity, and exposure to sun and wind determine a plant's growth and success or failure in its enviroment. Today, nearly all American reference books, nursery catalogs, and gardening magazines describe plants using USDA hardiness zones.