Cottage Farms uses this map to determine the Hardiness Zone you are located in. This information helps Cottage Farms determine when to ship your plants to guarantee the best chances for your plant to grow well. You may also use this map to help you determine the best plants to place in your garden. If you would like to see our Hardiness Zone Shipping Map, click here.   Enter your zip code below and we'll tell you when we begin shipping spring plants to your zone. Ship to zone and date look-up Zipcode:      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