How to Grow Techny Arborvitae
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Techny Arborvitae
Thuja occidentalis 'Techny'
shrubTechny Arborvitae is a hardy, compact evergreen shrub with dense, feathery foliage that ranges from green in summer to bronze or purplish in winter. This cultivar is prized for its cold tolerance and ability to maintain its columnar shape with minimal pruning. It's an excellent choice for hedges, windbreaks, and ornamental landscaping in northern climates.
When should you plant Techny Arborvitae in your zone?
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Example Techny Arborvitae timeline · Pittsburgh, PA (Zone 6b)
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Plant Techny 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 Techny Arborvitae
Late summer into fallBefore the first fall frost (≈ Nov 8)
Sample dates for Pittsburgh, PA. Sign up to get exact Techny Arborvitae dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 2-7, exceptionally hardy in harsh northern climates
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Get my Techny Arborvitae timeline →Growth Stages
Establishment
First 6-12 monthsYoung transplant with developing root system; foliage is bright green and tender
Water regularly to establish deep roots. Stake if in windy location. Avoid heavy pruning in first year.
Vegetative Growth
Year 1-3Vigorous upright growth with dense branching; foliage becomes thicker and more compact
Light pruning to shape desired form. Remove any dead or damaged branches. Maintain consistent moisture.
Maturation
Year 3 onwardPlant reaches full height (typically 12-20 feet depending on cultivar selection); dense columnar form is fully developed
Prune only for shape maintenance or to remove dead wood. Once established, very drought-tolerant.
Seasonal Color Change
Fall through early springFoliage transitions to bronze, copper, or purplish tones in fall and winter
This is normal and does not indicate disease. Spring will bring return to green coloring.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Spray foliage with water to dislodge; use insecticidal soap or miticide if severe; improve air circulation
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Hand-pick bags in late fall or winter; apply Bacillus thuringiensis (Bt) in early summer
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Prune out affected foliage; apply insecticidal soap; maintain plant vigor through proper care
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Install deer fencing; use deer repellents; plant among less palatable species
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Ensure excellent drainage; avoid overwatering; remove and discard heavily affected plants; improve soil aeration
Uses
Windbreak and Privacy Screen
HouseholdTechny's dense growth habit and hardy nature make it ideal for creating windbreaks and privacy hedges in northern regions. Multiple plants can be planted in rows to create an effective barrier. [source]
Holiday Decorations
CraftBranches are traditionally used in holiday wreaths, garlands, and festive arrangements. The evergreen foliage retains a pleasant fragrance when dried. [source]
Habitat and Shelter
WildlifeProvides year-round shelter and nesting sites for birds and small wildlife. Dense foliage offers protection from harsh winter conditions and predators. [source]
Landscape and Ornamental Use
HouseholdValued for its attractive columnar shape, dense foliage, and seasonal color changes from green to bronze. Excellent as specimen plants or in groupings for visual interest. [source]
Traditional Herbal Medicine
MedicinalArborvitae foliage has been used in traditional medicine preparations, though modern clinical evidence is limited. Use should be supervised by herbalists or healthcare providers. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Techny Arborvitae is not harvested for food or traditional harvest. Branches can be cut for holiday decorations or arrangements; cut in late fall or winter when dormant to minimize stress on the plant.
Fun Facts
- 🌱 Techny Arborvitae was developed at the Plimpton Arboretum in Techny, Illinois, hence its name—it was bred specifically to survive the harsh winters of the Midwest.
- 🌱 The name 'arborvitae' comes from Latin meaning 'tree of life,' reflecting its historical use by Native Americans as a source of vitamin C (in bark and foliage) to prevent scurvy.
- 🌱 Techny's foliage releases a pleasant, spicy fragrance when brushed or bruised, and the essential oils have been historically valued for aromatic and medicinal purposes.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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