Thuja 'Smaragd' (Green Cedar, Green Arborvitae)

How to grow Thuja 'Smaragd' (Green Arborvitae) in NZ

Thuja 'Smaragd' grows best in full sun to light shade and moist, well-drained soil. It is well suited to most parts of New Zealand and is commonly used for formal hedging or as a vertical accent. Choose a sunny, sheltered position for best results. Water regularly during the first year to establish a deep root system, especially during dry spells. Once established, it is moderately drought tolerant. Apply a balanced, slow-release fertiliser in spring, and prune lightly to shape if needed. However, this variety naturally maintains a dense, narrow form without requiring heavy trimming.

Thuja 'Smaragd' care tips

Thuja 'Smaragd' is easy to care for and naturally forms a dense, upright cone shape with minimal pruning. Water regularly during its first year to help establish a deep, healthy root system, then only during extended dry periods. It prefers full sun to light shade and moist, well-drained soil. Apply a slow-release fertiliser in early spring to encourage rich green foliage. Light trimming can be used to maintain a formal shape, but heavy pruning is generally not necessary. Mulch around the base to retain moisture and suppress weeds.

Plant size, spacing, and growth rate

Thuja 'Smaragd' typically grows to 3–4 metres tall and 60–90 cm wide, forming a narrow, conical shape. It has a slow to moderate growth rate, adding around 20–30 cm of height per year under ideal conditions. For hedging, space plants 60–80 cm apart to create a dense screen. As a specimen or accent plant, allow at least 1 metre of space around each plant to showcase its elegant form.

Why buy Thuja 'Smaragd' from The Plant Company?

The Plant Company supplies premium quality Thuja 'Smaragd' trees grown specifically for New Zealand conditions. Our plants are selected for strong, healthy growth and a well-shaped form so they can become excellent hedging or specimen plants. With secure packaging and nationwide delivery, you can trust The Plant Company to provide trees that establish quickly and thrive in your garden.