Thuja occidentalis 'Smaragd' (Green Cedar)

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

Thuja occidentalis '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 occidentalis 'Smaragd' care tips

Thuja occidentalis '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 for Thuja occidentalis 'Smaragd' (Green Cedar, Green Arborvitae)

Thuja occidentalis '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.

Landscaping uses for Thuja occidentalis 'Smaragd' (Green Cedar, Green Arborvitae)

Use Thuja occidentalis 'Smaragd' (Green Cedar, Green Arborvitae) for structural planting, evergreen garden features, and formal landscape designs. Thuja occidentalis 'Smaragd' (Green Cedar, Green Arborvitae) is commonly included in a mixed planting, used as a backdrop for smaller plants, grown for shelter or screening, used for hedging, or planted to line an entranceway or avenue. Position it where its natural form can be appreciated and allow sufficient space for mature growth. Combine it with plants that enjoy similar light, soil, and watering conditions for a practical and cohesive display.

Why buy Thuja occidentalis 'Smaragd' (Green Cedar, Green Arborvitae) from The Plant Company?

Buy Thuja occidentalis 'Smaragd' (Green Cedar, Green Arborvitae) from The Plant Company, NZ's most trusted plant nursery. Choose from our extensive range and get practical advice to help match your plants to your local conditions. Our team makes online ordering straightforward, with careful packing and delivery throughout New Zealand. Whether you are planning structural planting or refreshing an established display, we can help you select suitable plants. Explore the available options and take the next step towards a beautiful, rewarding planting project.