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USDA Alaska Plant Hardiness Zone Map

Indicator Plant Examples Listed by Zone

[Back to the Zone Map Page] [Back to Main Page]

Check the color of the section in your area of the map with the color key below. Zones 1 through 7b represented here.

  alaskaph.jpg (121672 bytes)

USDA Hardiness Zones and Average Annual Minimum
Temperature Range

 USDA Zone   Temperature Range Example Cities
         1  Below -50 F (-45.6C) Fairbanks, Alaska
Resolute, Northwest Territories (Canada)
        2a -50 to -45 F (-42.8 to -45.5 C) Prudhoe Bay, Alaska
Flin Flon, Manitoba (Canada)
        2b -45 to -40 F (-40.0 to -42.7 C) Unalakleet, Alaska
Pinecreek, Minnesota
        3a -40 to -35 F (-37.3 to -39.9 C) International Falls, Minnesota
St. Michael, Alaska
        3b -35 to -30 F (-34.5 to -37.2 C) Tomahawk, Wisconsin
Sidney, Montana
        4a -30 to -25 F (-31.7 to -34.4 C) Minneapolis/St. Paul, Minnesota
Lewistown, Montana
        4b -25 to -20 F (-28.9 to -31.6 C) Northwood, Iowa
        5a -20 to -15 F (-26.2 to -28.8 C) Des Moines, Iowa
        5b -15 to -10 F (-23.4 to -26.1 C) Columbia, Missouri
Mansfield, Pennsylvania
        6a -10 to -5 F (-20.6 to -23.3 C) St. Louis, Missouri
Lebanon, Pennsylvania
        6b -5 to 0 F (-17.8 to -20.5 C) McMinnville, Tennessee
Branson, Missouri
        7a 0 to 5 F (-15.0 to -17.7 C) Oklahoma City, Oklahoma
South Boston, Virginia
        7b 5 to 10 F (-12.3 to -14.9 C) Little Rock, Arkansas
Griffin, Georgia

Listed by zone: Names of representative plants listed under the coldest zones in which they normally succeed.
Listed alphabetically: Cold hardiness ratings (zones) for selected woody plants.

Data based on USDA Miscellaneous Publication No. 1475.  Issued January 1990, U.S. National Arboretum, Agricultural Research Service, U.S. Department of Agriculture, Washington, DC 20002.


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Updated on October 20, 2018