Thuja occidentalis ‘Techny’ (American Arborvitae)

Thuja occidentalis ‘Techny’ is a highly regarded cultivar of the Eastern Arborvitae, cherished for its robust growth and landscaping utility.

Thuja occidentalis ‘Techny’: An In-depth Look

‘Techny’ is known for its dense, dark green foliage and pyramidal shape. This cultivar is appreciated for its uniform growth and rich color, making it a popular choice for both ornamental and functional landscaping.

Native: Thuja occidentalis is native to North America. It is predominantly found in the northeastern United States and southeastern Canada. This species naturally occurs in wet forests, swamps, and along lake shores, thriving in cool, moist, well-drained environments.

Plant Type and Habit: It is an evergreen conifer with a strong, pyramidal growth habit. The plant is characterized by its dense branching and lush foliage.

Size: ‘Techny’ typically grows to about 12-15 feet in height (3.6 to 4.5 meters) and 6-8 feet in width (1.8 to 2.4 meters). Its moderate size makes it suitable for various landscape applications.

Foliage: The foliage is a vibrant, dark green, remaining lush and full throughout the year. The leaves are scale-like and tightly packed on the branches.

Bark: The bark is reddish-brown, relatively smooth, and becomes more textured with age.

Uses: Commonly used for privacy screens, hedges, windbreaks, or as a specimen plant. Its dense growth makes it an excellent choice for creating a natural barrier.

Hardiness: Hardy in USDA zones 3-8, it can withstand cold winters and a range of environmental conditions.

Wildlife: American arborvitae provides nesting sites for songbirds, as well as cover, especially in the winter, for deer, which both feed on the branches and use them for shelter from the cold.

Toxicity: Generally considered non-toxic to humans and animals.

Deer and Rabbit: May suffer some damage from deer and rabbits, especially in areas where these animals are prevalent.

Invasiveness: This cultivar is not considered invasive and typically stays within its planted boundaries.

Benefits: Offers year-round greenery, is easy to maintain, and its dense growth habit makes it suitable for use as a natural screen or windbreak.

American Arborvitae Growing Tips

Light: Thrives in full sun but can also grow well in partial shade. Full sun exposure leads to denser foliage growth. Usually appreciates some light afternoon shade in hot summer climates. Protect from drying winds, especially when young.

Soil: Adaptable to a wide range of soils but prefers moist, well-drained, slightly acidic to neutral soil. Tolerates clay soils.

Water: Regular watering is important, especially for young plants and in dry conditions. Avoid extreme dry soil in the fall, which can cause the evergreen foliage to dry out in winter.

Fertilizer: Apply a balanced, slow-release fertilizer in early spring. Over-fertilization can harm the plant, so follow the recommended rates.

Pruning: Little to no pruning is required. Prune for shaping or size control in late winter or early spring before new growth starts. Avoid heavy pruning.

Mulch: Provide a generous root zone mulch.

Propagation: Propagated through semi-hardwood cuttings in late summer.

Pests and Diseases: Watch for bagworms, spider mites, mealybugs, and scale insects. Leaf tips may suffer damage from leaf miners. Canker can sometimes pose a problem. Fungal diseases like root rot can occur in poorly drained soils. Good air circulation and proper planting depth help prevent these issues.