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USDA Plant Hardiness Zone Map

South-Midwest US

Arkansas, Colorado, Illinois, Kansas, Louisiana, Mississippi, Missouri, New Mexico, Oklahoma, Texas


Check the color of the section in your area of the map with the color key below.

Zones 4b through 9b represented here.   

South-Midwest region Hardiness Zone Map Zone Color Key


USDA Hardiness Zones and Average Annual Minimum Temperature Range

  Zone  

  Fahrenheit  

    Celsius    

  Example Cities  

1

 Below -50 F  

Below -45.6 C

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; Nebraska

5a

-20 to -15 F

-26.2 to -28.8 C

Des Moines, Iowa;   Illinois

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;   Victorville, California

10b

35 to 40 F

4.4 to 1.7 C

Miami, Florida;   Coral Gables, Florida

11

above 40 F

above 4.5 C

Honolulu, Hawaii;   Mazatlan, Mexico