Thuja 'Green Giant'

How to grow Thuja 'Green Giant' in NZ

Thuja 'Green Giant' grows best in full sun to light shade and moist, well-drained soil, making it well-suited to many areas of New Zealand. This fast-growing evergreen is ideal for creating quick hedges, privacy screens, or windbreaks. Plant in a sunny, sheltered location and water regularly during the first year to establish a strong root system. Once established, it is tolerant of wind, light frost, and short dry spells. Apply a slow-release fertiliser in spring and mulch around the base to conserve moisture and suppress weeds. Light pruning can be done to maintain a dense, uniform shape if desired.

Thuja 'Green Giant' care tips

Thuja 'Green Giant' is a low-maintenance plant that is ideal for fast hedging or screening. Water regularly during the first year to establish a strong root system, then only during extended dry periods. It thrives in full sun to light shade and prefers moist, well-drained soil. Apply a slow-release fertiliser in early spring to encourage lush growth, and mulch around the base to retain moisture and reduce weed competition. Light pruning, done once or twice a year, helps maintain the shape and encourages denser foliage, especially when used as a hedge.

Thuja 'Green Giant' growth rate and spacing

Thuja 'Green Giant' has a fast growth rate, typically growing 60–90 cm per year under ideal conditions. It can reach 10–15 metres tall and 3–4 metres wide at maturity if left untrimmed. For hedging or screening purposes, space plants 1–1.5 metres apart to create a dense, uniform barrier. If planting as individual specimens, allow 3–4 metres of spacing to accommodate their full mature spread.

How to trim Thuja 'Green Giant'

Trim Thuja 'Green Giant' in late spring or early summer once new growth has emerged. Use sharp hedge shears or loppers to shape the plant, trimming back the soft, green tips to encourage denser growth. Avoid cutting into old wood, as it may not resprout. For hedging, maintain a slightly tapered shape (wider at the base) to allow even light exposure. One light trim per year is usually enough to keep the plant neat and compact. Always remove any dead or damaged branches as needed.

Thuja 'Green Giant' for sale from The Plant Company

Thuja 'Green Giant' from The Plant Company is a premium, fast-growing evergreen ideal for hedging and shelter in New Zealand gardens. Our plants are nursery-grown to be strong and healthy, ensuring quick establishment and vigorous growth. With secure packaging and reliable nationwide delivery, The Plant Company makes it easy to add this hardy, low-maintenance tree to your landscape.