J A N U A R Y / F E B R U A R Y 2 0 2 4 • A R B O R D AY. O R G
American Arborvitae Thuja occidentalis
THIS EVERGREEN’S NATIVE RANGE is southeastern Canada and the northeastern United States. It’s a hard-working, versatile specimen that can solve many landscaping challenges. The narrow, pyramid shape makes it a natural choice for windbreaks. It requires almost no care when used as a hedge or screen. Pairs of these hardy trees make great accents for doors and garden gates. And single trees soften house corners.
LEAVES: Very small and scale-like. They are packed closely together in overlapping rows, giving branches the appearance of flattened, fan-like sprays. They change from bright
green in the summer to a multitude of rich yellow-brown-green hues in the winter. A pleasing aroma is released when leaves are squeezed.
CONES: Tiny, light brown or reddish, about 3/8 to 1/2 inch long and blunt at the tip. Seeds are released in autumn, but the cones persist through the winter months. BARK: Grayish-brown to reddishbrown with ridges and shallow furrows. Not typically visible due to the tree’s dense leafing structure. FORM: A medium-sized tree with a shallow, wide-spreading root system and narrow, pyramid-shaped crown. Maximum height is 40–60 feet with a spread of 12–15 feet. American arborvitae can be formed as an attractive, dense hedge when planted 2–3 feet apart with regular shearing. WILDLIFE VALUE: Provides shelter in the winter and nesting sites for
grackles, robins, and house finches in the summer. Browsed by deer, cottontail rabbits, snowshoe hares, and an occasional moose. The seeds are eaten by red squirrels and birds such as pine siskins.
PLANTING: Suitable in hardiness zones 3–7. Full sun is needed for rapid growth, but shade is tolerated. Moist, well-drained loam or sandy loam soil with a pH level of 6–8 is optimal. To purchase or learn more about this tree and others, visit arborday.org/americanarborvitae or scan this QR code.
REFORESTATION EXPANDS TO NEW REGIONS, BENEFITS MORE SPECIES OF LEMURS
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