Western Red Cedar
Thuja plicata · Evergreen, Coniferous, Softwood, Native
Plant Family
Cupressaceae
Tree Category
Evergreen Conifer, Shade Tree, Native, Timber Tree
Variety / Cultivar
Common species (wild type likely, though cultivars like 'Excelsa' or 'Green Giant' hybrids appear similar)
Hardiness Zones
USDA Zones 5 - 7; highly adapted to cool, maritime climates with mild winters and cool summers.
About This Tree
A very large, long-lived coniferous tree with a conical to pyramidal habit. It features a dense, tiered crown with drooping branches that often turn upward at the ends (J-shape). It is known for its rot-resistant wood and fragrant foliage.
Leaf Characteristics
Small, scale-like leaves arranged in flat, lacy sprays. The leaves are dark green on top with whitish 'butterfly' markings or stomatal patterns on the underside. They are opposite and overlapping.
Bark Characteristics
Cinnamon-red to greyish-brown bark that is thin and fibrous. It develops longitudinal fissures and peels in long, thin, vertical strips, especially on mature trees.
Growing Information
Origin Region
Pacific Northwest of North America; native from southern Alaska to Northern California
Growing Season
Evergreen; growth is most active in spring and early summer. Cones develop in summer and ripen by autumn. No dormancy in the traditional deciduous sense.
Sunlight & Water Needs
Full sun to partial shade; prefers moist, well-drained soils and high humidity. It is not very drought-tolerant and requires consistent moisture to thrive.
Mature Size
Height: 100-200 feet (forest); 50-70 feet (landscape). Spread: 10-25 feet. Growth Rate: Moderate to Fast. Lifespan: 400-1,000+ years.
Special Characteristics
Highly rot-resistant wood (used for shingles and decks), attractive aromatic foliage, excellent for privacy screening and windbreaks. Very shade tolerant for a conifer.
Wildlife & Ecology
Provides critical nesting sites for birds and cover for small mammals. The seeds are eaten by squirrels and songbirds. In its native range, it is a foundation species for ancient forest ecosystems.