How to Grow Eastern Arborvitae
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Eastern Arborvitae
Thuja occidentalis
treeEastern arborvitae is a native evergreen conifer prized for its narrow, columnar form and feathery, scale-like foliage that ranges from green to golden depending on the variety and season. It is widely used as a screening plant, windbreak, or ornamental specimen in landscapes. The tree produces small, cone-like fruits and aromatic wood that has been valued historically for medicinal and household uses.
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Example Eastern Arborvitae timeline · Pittsburgh, PA (Zone 6b)
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Plant Eastern 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 Eastern Arborvitae
Late summer into fallBefore the first fall frost (≈ Nov 8)
Sample dates for Pittsburgh, PA. Sign up to get exact Eastern Arborvitae dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 2-8; most vigorous in zones 3-7
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Get my Eastern Arborvitae timeline →Growth Stages
Establishment (Year 1)
12 monthsYoung tree establishing root system; foliage may appear slightly bronze or stressed as it adjusts to new location
Water consistently and deeply; apply 2-3 inches of mulch around base. Avoid fertilizing first year; allow roots to establish naturally. Protect from strong winds.
Vegetative Growth (Years 2-3)
24 monthsRapid height and width gain; foliage becomes denser and more vibrant green; tree develops characteristic columnar or pyramidal shape
Continue regular watering during dry periods. Light pruning in early spring to shape if desired. Maintain mulch layer. Apply balanced fertilizer in spring if needed.
Maturation (Years 4+)
OngoingTree reaches desired landscape size with dense, full foliage; develops natural form; cone production begins
Reduce watering frequency as tree becomes drought-tolerant. Prune only for shaping or to remove dead/diseased branches. Monitor for pests and diseases.
Seasonal Color Change
October-AprilIn fall and winter, foliage may shift from bright green to bronze, russet, or golden tones depending on variety and cold exposure
This is normal; no intervention needed. Provide windbreak protection in exposed sites to minimize bronzing stress. Color typically returns to green in spring.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Prune and remove infested foliage; apply neem oil or spinosad in spring; ensure adequate tree vigor through proper watering
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Hand-pick and destroy bags in fall/winter; spray with Bacillus thuringiensis (Bt) in late spring when caterpillars are young
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Increase humidity with regular misting; spray with strong water stream to dislodge; use miticide if severe
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Prune out dead/diseased branches; improve air circulation; avoid wounding; maintain tree health with proper watering
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Improve drainage; avoid overwatering; ensure mulch doesn't touch trunk; remove severely affected trees
Uses
Traditional Tea & Respiratory Support
MedicinalHistorically, Eastern arborvitae leaf tea was used by Indigenous peoples and early settlers to treat respiratory ailments and vitamin C deficiency. The leaves contain thujone and other volatile oils with antimicrobial properties. [source]
Natural Insect Repellent
HouseholdThe aromatic foliage and wood contain volatile oils that naturally repel certain insects and pests. Dried foliage or wood can be used in sachets or stored with textiles. [source]
Wood Crafts & Aromatics
CraftThe fragrant, rot-resistant wood is prized for woodworking, fence posts, shingles, and decorative items. Its natural aroma makes it valuable in craft projects. [source]
Wildlife Habitat & Shelter
WildlifeDense branching provides year-round shelter for birds and small mammals. The cones offer seed food for wildlife, and the tree's structure creates nesting sites. [source]
Flavoring Agent (Use with Caution)
CulinaryHistorically used sparingly to flavor beverages and foods in Scandinavian and European cuisines. Modern culinary use is limited due to thujone content; small amounts in traditional recipes only. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Eastern arborvitae is an ornamental tree not typically harvested. However, foliage can be cut for fresh arrangements year-round. For medicinal tea, fresh or dried leaves and twigs can be harvested in summer. Collect cones in fall once they turn brown and dry. Always harvest sustainably and only from healthy, mature trees.
Fun Facts
- 🌱 Eastern arborvitae is native to eastern North America and was one of the first trees exported to Europe in the 16th century, becoming known as 'Tree of Life' to French explorers because it helped prevent scurvy.
- 🌱 The foliage naturally produces a unique scent described as fresh and slightly citrusy-woodsy, especially when crushed or warmed by the sun.
- 🌱 Some varieties can live over 300 years in ideal conditions, with the oldest known specimens exceeding 1,000 years old in protected forests.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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