How to Grow Fastigiata Arborvitae
Fastigiata Arborvitae
Thuja occidentalis 'Fastigiata'
treeFastigiata Arborvitae is a narrow, columnar evergreen conifer prized for its vertical accent in landscapes. It features soft, feathery foliage that transitions from bright green in summer to bronze or copper tones in winter. This cultivar is ideal for creating living screens, windbreaks, and formal hedges in cooler climates.
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Example Fastigiata Arborvitae timeline · Pittsburgh, PA (Zone 6b)
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Plant Fastigiata 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 Fastigiata 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 2-7, with acceptable performance into zone 8
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Get my Fastigiata Arborvitae timeline →Growth Stages
Establishment
First 12 months after plantingYoung transplant with tender new growth; soil and root system are still developing
Water frequently and consistently. Mulch around base (2-3 inches, keeping 2-3 inches away from trunk). Shelter from harsh winds if possible. Avoid fertilizing in first year.
Early Growth
Years 2-4Rapid vertical growth phase with establishment of main structural branches; foliage becomes denser
Continue regular watering. Apply balanced or slow-release fertilizer in spring. Remove any damaged or dead branches. Begin light pruning to shape if needed.
Maturation
Years 5-15Reaches full columnar form with dense, fine-textured foliage; vertical growth continues at slower pace
Water during dry periods. Prune selectively to maintain shape and remove any wayward branches. Monitor for pests and diseases.
Full Maturity
Year 15 onwardTree reaches full height (typically 15-20 feet) with maximum density; winter color intensifies to bronze or copper
Prune annually in late winter or early spring to maintain columnar shape. Thin interior branches occasionally to prevent dense, moisture-trapping foliage. Apply preventive fungicide if needed in humid areas.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Prune and remove infested branches. Apply spinosad or neem oil in late May through June when larvae are active. Maintain tree vigor through proper watering.
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Spray foliage with strong water stream to dislodge mites. Apply miticide or neem oil if severe. Maintain adequate moisture to prevent stress.
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Remove bags by hand in dormant season. Treat with spinosad or Bt (Bacillus thuringiensis) in early summer when caterpillars are small.
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Remove severely infested branches. Maintain tree health and vigor. No chemical controls recommended; focus on prevention through proper care.
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Spray horticultural oil in spring before bud break. Apply insecticide in early summer targeting crawlers. Prune infested branches if isolated.
Uses
Living Screen and Windbreak
HouseholdFastigiata Arborvitae's narrow columnar form makes it exceptional for creating natural privacy screens and windbreaks. Plant in rows 3-4 feet apart to form a dense, protective hedge. [source]
Landscape Design Accent
HouseholdThe vertical accent of this cultivar adds architectural interest and elegance to formal gardens, contemporary landscapes, and traditional designs. Its winter color change provides year-round visual interest. [source]
Wildlife Shelter and Food
WildlifeProvides excellent shelter and nesting habitat for songbirds and small mammals. The dense foliage offers protection from predators, and the plant produces small cones that birds and wildlife consume. [source]
Urban and Small Space Landscaping
HouseholdIts narrow width (3-5 feet) makes Fastigiata ideal for tight spaces like narrow side yards, building foundations, and urban landscapes where columnar trees are essential. [source]
Foliage for Holiday Crafts
CraftFresh arborvitae foliage can be used in holiday wreaths, garlands, and floral arrangements. The aromatic, soft foliage adds texture and a subtle evergreen scent to seasonal decorations. [source]
Harvest Tips
Not harvested for food. For ornamental purposes, prune in late winter (February-March) or early spring before new growth. Remove dead, diseased, or crossing branches. Thin interior foliage occasionally to promote air circulation and prevent fungal diseases. Avoid heavy pruning that removes too much foliage; Fastigiata will not regenerate from bare wood.
Fun Facts
- 🌱 The common name 'Arborvitae' means 'tree of life' in Latin, reflecting its historical use in traditional medicine and its status as a revered tree in various cultures.
- 🌱 Fastigiata was discovered as a natural mutation in the 1800s and has become one of the most popular narrow evergreen selections for North American landscaping.
- 🌱 The foliage contains aromatic oils and has a distinctive mild fragrance, especially when brushed or crushed; it was traditionally used to repel insects and moths from clothing and storage areas.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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