SelecTree: Tree Detail
Photo Locations: San Francisco, CA, Washington Park Arboretum - Seattle, WA, The Morton Arboretum - Lisle, IL, Stanford, CA, UC Berkeley Botanic Garden - Berkeley, CA, The National Arboretum - Washington, DC, Leaning Pine Arboretum - Cal Poly San Luis Obispo, CA and Arnold Arboretum - Boston, MA
Needs ample moisture.
Native to Northeastern North America.
Erect and requires ample growing space.
Has Evergreen foliage.
Height: 30 - 60 feet.
Width: 10 - 15 feet.
Growth Rate: 12 to 24 Inches per Year.
Longevity 50 to 150 years or more.
Leaves Scalelike, Green, No Change, Evergreen.
Flowers Inconspicuous. Flowers in Spring. Has separate male and female flowers on the same tree (monoecious).
Beige or Brown Cone, Medium (0.50 - 1.50 inches), fruiting in Summer.
Bark Red Brown, Exfoliating or Furrowed.
Shading Capacity Rated as Dense in Leaf.
Litter Issue is Dry Fruit.
Tree Site Conditions & Constraints
Sunset Zones 1 - 9, 15 - 17 and 21 - 24; H1, H2.
USDA Hardiness Zones 2 - 7.
Exposure Full Sun to Partial Shade.
Clay, Loam or Sand Texture.
Highly Acidic to Slightly Alkaline Soil pH.
Seaside Tolerance is Good in Mild Zone.
Pests & Disease Information
Susceptible to Leaf Miner and Spider Mites, Armillaria, Phytophthora and Root Rot.
Health, Safety & Environmental Concerns
Branch Strength Rated as Strong.
Root Damage Potential Rated as Moderate.
Allergy Health Hazard.
Fire Resistance is Unfavorable.
Desirable Wildlife Plant.
Special Uses & Values
Cite this tree:
SelecTree. "Thuja occidentalis Tree Record." 1995-2020. Jul 11, 2020.
< https://selectree.calpoly.edu/tree-detail/thuja-occidentalis >
SelecTree Nursery Connection Map
Cal Poly / ESRI