How to Grow Columnar Green Arborvitae
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Columnar Green Arborvitae
Thuja occidentalis
shrubColumnar Green Arborvitae is a narrow, upright evergreen conifer prized for its dense, feathery foliage and distinctive pencil-thin silhouette. It maintains its shape naturally without excessive pruning and serves as an excellent privacy screen, windbreak, or focal point in landscapes. This native North American plant is hardy, low-maintenance, and provides year-round structure and color.
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Example Columnar Green Arborvitae timeline · Pittsburgh, PA (Zone 6b)
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Plant Columnar Green 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 Columnar Green Arborvitae
Late summer into fallBefore the first fall frost (≈ Nov 8)
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Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 3-7; tolerates zones 2-8
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Get my Columnar Green Arborvitae timeline →Growth Stages
Establishment
6-12 monthsYoung transplant with small root system and delicate foliage; plant is compact and pale green
Water consistently (2-3 times weekly), apply 2-3 inches of mulch around base, avoid fertilizer first season, protect from wind
Early Growth
1-2 yearsPlant develops stronger root system and increases height; foliage deepens in color and becomes denser
Continue regular watering, maintain mulch layer, light pruning to shape if desired, monitor for pests
Vegetative Growth
Ongoing for years 2-10Vigorous upright growth with full, feathery green foliage; plant reaches desired height
Water during dry spells, fertilize in early spring with balanced slow-release evergreen fertilizer, light pruning in late winter/early spring
Mature
Year 10+ (indefinite)Full-sized columnar plant with dense foliage reaching maximum height; color becomes darker, richer green
Water during extended drought, minimal pruning needed, apply slow-release fertilizer annually if desired, remove dead branches
Winter Dormancy
3-4 monthsFoliage may develop bronze or reddish tones in cold months; plant slows growth significantly
Reduce watering in winter, protect from heavy snow load (gently brush off), avoid using salt de-icers nearby
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Spray with water to dislodge, use neem oil or horticultural oil spray; increase humidity and avoid drought stress
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Hand-pick bags in fall/winter, apply Bt (Bacillus thuringiensis) in late spring, use insecticidal soap
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Prune and destroy infested foliage, apply insecticidal oil in spring; rarely requires treatment in mature plants
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Install 6-8 foot fencing, apply deer repellent spray, plant multiple specimens in groups
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and
Strong water spray, insecticidal soap, horticultural oil during dormant or early season
Uses
Privacy Screens & Windbreaks
HouseholdThe columnar form creates dense, living barriers that block wind, noise, and views. Plant in rows for effective privacy hedges and landscape boundaries. [source]
Holiday Decorations & Wreaths
CraftFragrant branches and foliage are traditionally used in holiday arrangements, wreaths, and garland. The aromatic foliage has been used for centuries in festive decorations. [source]
Traditional Herbal Medicine
MedicinalArborvitae has been used in traditional medicine for immune support and respiratory health. The foliage contains thujone and other volatile compounds with antimicrobial properties. [source]
Wildlife Habitat & Food Source
WildlifeProvides shelter and nesting sites for songbirds and small mammals. Birds consume seeds and use dense foliage for protection from predators. [source]
Landscape Structure & Design
HouseholdCreates vertical interest, defines spaces, and adds year-round architectural structure to gardens. The consistent columnar form complements modern and traditional landscapes. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Arborvitae is not harvested for edible use. Branches may be cut for floral arrangements and holiday decorations; harvest in fall/winter. Prune lightly in late winter or early spring to maintain shape and remove dead branches. Avoid heavy pruning into bare wood, as it does not regenerate well.
Fun Facts
- 🌱 The name 'arborvitae' means 'tree of life' in Latin—it was considered a medicinal cure-all by early European settlers and was one of the first North American plants to be introduced to Europe
- 🌱 Arborvitae foliage is aromatic when brushed and releases a pleasant, slightly medicinal fragrance that has been valued for centuries
- 🌱 Some columnar cultivars like 'Emerald Green' can grow 40-50 feet tall but remain only 3-4 feet wide, making them exceptionally efficient space-savers for narrow gardens
Gardening Terms
New to gardening? Learn about terms used in this guide:
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