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USDA Plant Hardiness Zone Map
Southwest US:  Arizona, California, Nevada, Utah

[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 5b through 10b represented here

  south-west area


USDA Hardiness Zones and Average Annual Minimum
Temperature Range


 USDA Zone

Temperature Range Example Cities
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
8a

10 to 15 F  (-9.5 to -12.2 C)

Tifton, Georgia
Dallas, Texas 
8b

15 to 20 F  (-6.7 to -9.4 C)

Austin, Texas
Gainesville, Florida
9a

20 to 25 F  (-3.9 to -6.6 C)

Houston, Texas
St. Augustine, Florida
9b

25 to 30 F  (-1.2 to -3.8 C)

Brownsville, Texas
Fort Pierce, Florida

10a

30 to 35 F (1.6 to -1.1 C) 

Naples, Florida
Barstow, California

10b

35 to 40 F  (4.4 to 1.7 C) 

Miami, Florida
Coral Gables, Florida

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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