Arborvitae Care Guide

Arborvitae is a popular evergreen plant known for its dense foliage, attractive shape, and ability to create natural privacy screens. Whether you want to build a green hedge, add structure to your landscape, or grow an ornamental tree, arborvitae is an excellent choice. However, choosing the right variety and providing proper care are essential because some planting mistakes can be difficult to correct later.

Taxonomy of Arborvitae

Arborvitae belongs to the Thuja genus in the Cupressaceae family, which includes cypress trees and other evergreen conifers. Its name means “tree of life,” reflecting its historical importance in traditional uses.

Two commonly grown species are Thuja occidentalis, known as American arborvitae or northern white cedar, and Thuja plicata, commonly called western red cedar. These plants feature scale-like leaves that remain green throughout the year, although foliage color varies among cultivars.

Arborvitae can grow as upright trees, compact shrubs, or narrow columnar plants, depending on the variety. Their versatility makes them suitable for gardens, hedges, foundation plantings, and landscape borders.

Popular Arborvitae Varieties

Some varieties are better suited to particular garden sizes and purposes.

• Emerald Green: A compact, narrow variety that works well for privacy hedges and smaller landscapes.

• Green Giant: A fast-growing, vigorous evergreen suitable for large properties and tall privacy screens.

• Golden Arborvitae: Offers yellow or golden-green foliage that adds color and contrast to garden designs.

• North Pole: A relatively narrow, upright cultivar suitable for tighter spaces and formal planting arrangements.

Before choosing a variety, consider its mature height and width rather than relying on its size at the nursery.

Essential Arborvitae Care Tips

Arborvitae generally grows best in full sun to partial shade. Most varieties prefer well-drained soil with consistent moisture. Water newly planted trees deeply and regularly while their roots become established. During hot, dry weather, check the soil more frequently to prevent drought stress.

Apply a layer of organic mulch around the root zone to retain moisture and regulate soil temperature. Keep the mulch away from direct contact with the trunk to reduce the risk of rot.

Pruning is usually minimal. Remove dead, damaged, or diseased branches as needed, and lightly shape the plant when necessary. Avoid cutting deeply into old, bare wood because many arborvitae varieties produce little or no new growth from those areas.

Mistakes You Can't Easily Undo

One of the biggest mistakes is planting arborvitae too close together or too near buildings, fences, and utility lines. Overcrowding can restrict airflow and create long-term maintenance problems.

Another common error is allowing the roots to dry out during establishment. Drought stress can cause browning that may not recover, especially if branches die completely. Poor drainage can also damage roots and lead to decline.

Finally, avoid excessive pruning and choosing varieties without checking their mature dimensions. With proper planning, suitable growing conditions, and consistent care, arborvitae can provide year-round greenery and privacy for many years.