White Cedar Growing Zones

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.

Keywords: Thuja ocidentalis, evergreen conifer, planting zones

About this Author

James Burghardt has written for "The Public Garden," "Docent Educator," non-profit newsletters and for horticultural databases, becoming a full-time writer in 2008. He holds a Master of Science in public horticulture from the University of Delaware and studied horticulture and biology in Australia at Murdoch University and the University of Melbourne.