• slide
  • slide
  • slide
  • slide
  • slide
  • slide
  • slide
  • slide
  • slide
  • slide
  • slide

Plant Hardiness Zones

Increase your gardening success by selecting plants suited to your cold hardiness zone and other environmental conditions.

Hardiness zones reflect the average minimum temperatures for an area. Buying cold hardy plants helps reduce losses when extreme winter temperatures occur.

You’ll find the USDA Plant Hardiness Map printed in garden books and catalogues. Locate your town on the map and match the color of your region on the map key. Or enter your zip code at the USDA Plant Hardiness Map website and your hardiness zone and minimum winter temperature range will appear.

Each hardiness zone represents areas within a 10-degree Fahrenheit range of minimum temperatures. This zone is subdivided into 5 degrees segments to more precisely represent that area within each zone.  The lower the number; the colder the winter temperatures.

A bit more information: Heat hardiness zones reflect the average number of days over 86 degrees (“heat days”) in a region. Plants are rated based on their ability to withstand a certain number of heat days. See the AHS Plant Heat Zone Map to find your heat zone to help you select plants suited to your area.

Related

Upcoming Appearances


Sept. 23, 2021
Pollinator-Friendly Perennials for Difficult Situations 
Webinar

Sept. 25, 2021
Green Bay Botanic Garden
25th Birthday Celebration

in-person

Sept. 30, 2021
Shade Gardening for Beauty and Pollinator Appeal 
Webinar

Oct. 9, 2021
Everything Hydrangeas
@ Sanger House Gardens

in-person

Oct. 20, 2021
Kid & Pet Friendly Houseplants
Webinar

Oct. 23, 2021
San Diego Fall Home & Garden Show
Del Mar, CA

Oct. 27, 2021
Pruning Tips for Shrubs
Webinar

Register today! Plus, watch Melinda's past webinars ON DEMAND
for a limited time.

Learn More

Book an Appearance

Learn More

Enter to win a $150
Corona Tools Gift Card

ENTER NOW