o Hardiness Zone Finder

What is a zone designation?

The U.S. Department of Agriculture plant hardiness zone designations represent the average annual extreme minimum temperatures at a given location during a particular time period. They do not reflect the coldest it has ever been or ever will be at a specific location, but simply the average lowest winter temperature for the location over a specified time. Low temperature during the winter is a crucial factor in the survival of plants at specific locations. Gardeners should keep that in mind when selecting plants, especially if they choose to "push" their hardiness zone by growing plants not rated for their zone.

Why do I need to show it on my profile page?

This field is optional and will not be visible unless you opt in to it within your account settings. However, adding a zone field to your profile page will allow you to connect with other gardeners in similar climates. The zone will also appear after your membername when you post on our gardening forums.

How do I find my zone?

United States

Enter your zip code to find your zone:
U.S. Hardiness Zone Map

Canada
Plant Hardiness Zones in Canada

Europe
Plant Hardiness Zones in Europe

Australia
Plant Hardiness Zones in Australia

Other Users
Use our Hardiness Zone Chart

USDA Plant Hardiness Zone Map, 2012. Agricultural Research Service, U.S. Department of Agriculture. Accessed from http://planthardiness.ars.usda.gov /.

o Determining your Zone

The USDA hardiness zones are based the average annual minimum temperature that occurs in an area. So, even if you don't live in the U.S., you can probably come up with your approximate zone using this chart.
Hardiness Zone Chart
Annual Minimum Temperature
ZoneFarenheitCentigrade
1below -50 Fbelow -45.6 C
2a-50/-45 F-42.8/-45.5 C
2b-45/-40 F-42.7/-40.0 C
3a-40/-35 F-40.0/-37.3 C
3b-35/-30 F-37.2/-34.5 C
4a-30/-25 F-34.4/-31.7 C
4b-25/-20 F-31.6/-28.9 C
5a-20/-15 F-28.8/-26.2 C
5b-15/-10 F-26.1/-23.4 C
6a-10/- 5 F-23.3/-20.6 C
6b- 5/ 0 F-20.5/-17.8 C
7a 0/+ 5 F-17.7/-15.0 C
7b+ 5/+10 F-15.0/-12.3 C
8a+10/+15 F-12.2/- 9.5 C
8b+15/+20 F- 9.4/- 6.7 C
9a+20/+25 F- 6.6/- 3.9 C
9b+25/+30 F- 3.8/- 1.2 C
10a+30/+35 F- 1.1/+ 1.6 C
10b+35/+40 F+ 1.7/+ 4.4 C
11 above +40 F above +4.5 C
 
 
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