american arborvitae thuja occidentalis

Why Choose the American Arborvitae Thuja occidentalis?

American arborvitae Thuja occidentalis offers outstanding performance in a wide range of conditions. Its dense, soft foliage creates an effective windbreak or privacy hedge, while its manageable growth habit (usually 3 to 6 metres high for many popular forms) suits residential gardens. This low-maintenance conifer is cold-hardy, relatively drought-tolerant once established, and responds well to clipping and shaping, making it a favourite for topiary and formal hedges.

For many Kiwi gardeners, the classic species is a great choice—however, modern cultivars have added even more appeal. If you’re after a narrower form for tight spaces, Thuja occidentalis 'Pyramidalis' delivers a sleek columnar silhouette and vibrant green foliage. For gardeners craving year-round vivid colour, Thuja occidentalis 'Smaragd' (Green Cedar) boasts emerald-green, glossy leaves and excellent holding of colour through winter.

Comparing Thuja Varieties

The Thuja genus provides a wealth of options for nearly every landscape requirement. While the American arborvitae Thuja occidentalis remains a staple, other species like Thuja plicata—Western Red Cedar—offer more vigorous growth and a larger stature, making them suited to rural shelter plantings or larger properties. For a golden twist, Thuja plicata Old Gold (Thuja Old Gold) features striking golden-yellow foliage that brightens hedges and mixed borders.

Modern hybrid cultivars are also gaining popularity across New Zealand. Notably, Thuja 'Green Giant' is renowned for its rapid growth rate, tall upright habit, and resistance to many common garden pests, making it perfect for privacy screens and quick hedging solutions.

Growing Tips and Garden Uses

Plant American arborvitae Thuja occidentalis in moist, well-drained soil and a spot with full sun to partial shade. Regular watering helps young trees establish quickly, while a layer of mulch around the base conserves moisture and keeps roots cool. Annual trimming encourages denser growth and maintains your desired shape—perfect for formal hedges or screens.

Thuja occidentalis integrates beautifully with other evergreen conifers, ornamental grasses, and flowering shrubs. Try mixing cultivars for an eye-catching, year-round tapestry of shades and textures. Whether you need a fast-growing hedge for privacy, a stately garden specimen, or a low-maintenance background for borders, this classic Thuja remains a top choice for New Zealand gardens.