With bright green to yellowish-green sprays of scaly foliage, white cedar (Thuja occidentalis) makes a great hedge, screen or windbreak in gardens. Best in fertile, moist soils, the evergreen leaves of this conifer may brown in severe winter cold or drying winds. Consult plant labels of any varieties of this species at the nursery before buying, as growing zone guidelines may slightly differ.
USDA Hardiness Zone
The United States Department of Agriculture developed hardiness zones on average annual winter minimum temperatures. White cedar is suited for gardens in Zones 3 through 7, where winter cold ranges from -40 degrees to 0 degrees Fahrenheit annually.
AHS Heat Zone
In contrast to the cold-based USDA Hardiness Zones, the American Horticultural Society developed growing zones based on the number of days annually above 86 degrees Fahrenheit. White cedar is adapted for growing in AHS Heat Zones 1 through 7, in which the number of days above 86 degrees ranges from 1 to 90 each year.
Sunset Climate Zone
Gardeners in western North America, where elevation is highly variable, usually use Sunset Climate Zone ratings to determine if a plant is well-suited for their location. White cedar may be grown successfully in Sunset Zones A2 and A3, 1 through 9, 15 through 17, 21 through 24, and in H1 and H2.