What is my hardiness zone?
Enter your zip code in the form below, and we'll tell you
where you fall in the Arborday.org Hardiness zones database.
More about hardiness zones.
What are Hardiness Zones?
The Plant Hardiness Zones divide the United States and Canada
into 11 areas based on a 10 degree Fahrenheit difference in the
average annual minimum temperature. (The United States falls
within Zones 2 through 10).
For example, the lowest average temperature in Zone 2 is -50 to
-40 degrees Fahrenheit, while the minimum average temperature in
zone 10 is +30 to +40 degrees Fahrenheit. See more.
Suggested hardiness zones have been indicated for all trees and
perennials available online from the Foundation. If a range of
zones, for example, zones 4-9, is indicated, the tree or
perennial is known to be hardy in zones 4, 5, 6, 7, 8, and 9.
Suitable hardiness means a plant can be expected to grow in the
zone's temperature extremes, as determined by the lowest average
annual temperature. Keep in mind that local variations such as
moisture, soil, winds, and other conditions might affect the
viability of individual plants.
You may want to ask a local professional arborist or nursery
about which trees to plant in your community.
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