Container Gardening Tips

USDA Plant Hardiness Zones
& Average Annual Minimum Temperature Range

Use this chart to determine the plant hardiness zone you live in to help you make wise choices when you select plants for your container garden. This is most important when planting perennials and ordering from plant catalogs or nurseries outside of your region. Every plant has been given a zone designation, so inquire at the nursery where you purchase the plant if you are not sure.

ZoneFahrenheitCelsius Cities
1Below -50 FBelow -45.6 CFairbanks, Alaska; Resolute, Northwest Territories (Canada)
2a-50 to -45 F-42.8 to -45.5 CPrudhoe Bay, Alaska; Flin Flon, Manitoba (Canada)
2b-45 to -40 F-40.0 to -42.7 CUnalakleet, Alaska; Pinecreek, Minnesota
3a-40 to -35 F-37.3 to -39.9 CInternational Falls, Minnesota; St. Michael, Alaska
3b-35 to -30 F-34.5 to -37.2 CTomahawk, Wisconsin; Sidney, Montana
4a-30 to -25 F-31.7 to -34.4 CMinneapolis/St.Paul, Minnesota; Lewistown, Montana
4b-25 to -20 F-28.9 to -31.6 CNorthwood, Iowa; Nebraska
5a-20 to -15 F-26.2 to -28.8 CDes Moines, Iowa; Illinois
5b-15 to -10 F-23.4 to -26.1 CColumbia, Missouri; Mansfield, Pennsylvania
6a-10 to -5 F-20.6 to -23.3 CSt. Louis, Missouri; Lebanon, Pennsylvania
6b-5 to 0 F-17.8 to -20.5 CMcMinnville, Tennessee; Branson, Missouri
7a0 to 5 F-15.0 to -17.7 COklahoma City, Oklahoma; South Boston, Virginia
7b5 to 10 F-12.3 to -14.9 CLittle Rock, Arkansas; Griffin, Georgia
8a 10 to 15 F-9.5 to -12.2 CTifton, Georgia; Dallas, Texas ; Vancouver, BC (Canada)
8b15 to 20 F-6.7 to -9.4 CAustin, Texas; Gainesville, Florida
9a20 to 25 F-3.9 to -6.6 CHouston, Texas; St. Augustine, Florida
9b25 to 30 F-1.2 to -3.8 CBrownsville, Texas; Fort Pierce, Florida
10a30 to 35 F1.6 to -1.1 CNaples, Florida; Victorville, California
10b35 to 40 F4.4 to 1.7 CMiami, Florida; Coral Gables, Florida
11above 40 Fabove 4.5 CHonolulu, Hawaii; Mazatlan, Mexico