How to Grow Pyramidal Arborvitae
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Pyramidal Arborvitae
Thuja occidentalis 'Pyramidalis'
treePyramidal Arborvitae is a narrow, columnar evergreen conifer prized for its dense, pyramid-shaped form and vibrant green foliage. It maintains its distinctive narrow profile without excessive pruning and provides year-round structure and privacy screening in landscapes. The foliage turns bronze or brown in winter in colder climates, returning to green in spring.
When should you plant Pyramidal Arborvitae in your zone?
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Example Pyramidal Arborvitae timeline · Pittsburgh, PA (Zone 6b)
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Plant Pyramidal Arborvitae
Around Apr 17Near Pittsburgh's average last spring frost.
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Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
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Harvest Pyramidal Arborvitae
Late summer into fallBefore the first fall frost (≈ Nov 8)
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Growing Conditions
Soil
Growing Zones
Find your zone →Thrives best in zones 3-7, with limited success in zone 8
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Get my Pyramidal Arborvitae timeline →Growth Stages
Establishment
First 1-2 yearsFreshly planted young tree with active root development and initial shoot growth
Water consistently to keep soil moist. Mulch around base (2-3 inches, away from trunk). Protect from wind and harsh conditions.
Early Growth
Years 2-5Tree develops more robust branching and fills out its pyramidal form; foliage thickens
Continue regular watering. Light pruning only to maintain shape and remove dead branches. Avoid heavy pruning.
Developing Structure
Years 5-15Tree gains significant height and width, pyramidal form becomes more pronounced
Reduce watering frequency as roots deepen. Monitor for pests and disease. Prune selectively if needed to maintain shape.
Maturity
Year 15+ (indefinite)Tree reaches full mature size (20-30 feet tall, 3-4 feet wide) with dense, well-defined pyramid shape
Minimal care needed. Prune only to remove dead wood or maintain desired shape. Water during severe droughts.
Seasonal Color Change
Winter months (dormant season)Winter foliage may turn bronze or brown, especially in colder zones; returns to green in spring
This is normal and not a sign of disease. Ensure adequate moisture before winter dormancy.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Monitor foliage for stippled or brownish leaves. Prune out affected branches. Apply horticultural oil in early spring before egg-laying. Insecticides (spinosad, neem) may be used if severe.
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Spray foliage with water to dislodge. Apply horticultural oil or neem oil in spring. Ensure adequate moisture to reduce stress.
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Hand-pick bags in winter/early spring before emergence. Prune out heavily infested branches. Apply Bt (Bacillus thuringiensis) or spinosad in late May through June when caterpillars are young.
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Spray with strong water jet to dislodge. Use insecticidal soap or neem oil if population is high. Encourage natural predators.
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Install deer fencing (6-8 feet tall) or use repellent sprays (capsaicin, predator urine). Young trees are more vulnerable; protect with tree guards.
Uses
Privacy Screening & Windbreak
HouseholdIts narrow, dense columnar form makes it ideal for creating living screens and privacy hedges along property lines and for reducing wind exposure. Multiple trees planted in rows can create effective windbreaks. [source]
Ornamental Landscaping
HouseholdThe distinctive pyramidal shape and year-round evergreen foliage provide elegant vertical accent in gardens, formal landscapes, and foundation plantings. Its narrow width makes it perfect for small spaces. [source]
Wildlife Habitat
WildlifeProvides shelter and nesting sites for birds and small mammals, particularly in winter. Dense foliage offers protection from predators. [source]
Holiday Greenery
CraftBranches can be harvested for holiday wreaths, garlands, and fresh arrangements. The aromatic foliage has a pleasant cedar-like scent. [source]
Harvest Tips
Pyramidale Arborvitae is not harvested for food or material. Small amounts of foliage can be cut for fresh holiday arrangements or wreaths in late fall/early winter. Use sharp pruners and harvest only small branches to avoid spoiling the tree's form.
Fun Facts
- 🌱 Pyramidale Arborvitae is one of the narrowest evergreen trees available, making it ideal for urban landscapes and tight spaces where traditional trees would be too wide.
- 🌱 The name 'arborvitae' means 'tree of life' in Latin, and these trees were revered by Native Americans and early colonists for their durability and usefulness.
- 🌱 In winter, the foliage often turns a bronze or russet color due to increased anthocyanin production as a natural anti-freeze response; this is completely normal and not indicative of disease or poor health.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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