The Green Giant arborvitae (Thuja standishii x plicata ‘Green Giant’) is a fast-growing and popular evergreen tree known for its impressive size, dense foliage, and hardiness. The Green Giant arborvitae is prized for its rapid growth, tall stature, dense foliage, and adaptability to various growing conditions. It is a versatile evergreen tree suitable for creating privacy screens, windbreaks, or as a striking focal point in larger landscapes.
Size and Growth Rate for specimen planting:
Height: Green Giant arborvitaes are exceptionally tall, typically reaching heights of 30-50 feet (9-15 meters) at maturity if planted as a specimen tree.
Width: The tree has a narrow to pyramidal shape with a spread of 12-20 feet (3.7-6 meters) at the base if planted as a specimen tree.
Size and Growth Rate for specimen planting for privacy or hedge planting
5 foot spacing = 20 foot tall tree (Fastest privacy hedge)
6-8 foot spacing = 25-30 foot tree (Most common spacing for windbreaks)
10 foot spacing = 30-40 foot tree
Growth Rate: It is known for its rapid growth, adding 3 feet or more per year under optimal conditions once established.
Foliage: The foliage of Green Giant arborvitae is deep green year-round, providing a lush backdrop in both summer and winter landscapes. The scale-like leaves are arranged in flattened sprays that give the tree a feathery appearance.
Cones: Green Giant arborvitae produces small, inconspicuous cones that are typically less than half an inch (1 cm) long. These cones contain seeds that are dispersed naturally to propagate new trees.
Adaptability: Climate: It thrives in a wide range of climates, including both hot and cold regions. It is particularly well-suited to USDA hardiness zones 5-7, but can also grow well in zones 4 and 8.
Soil: Prefers well-drained soil but can tolerate a variety of soil types, including clay and sandy soils, as long as they are not waterlogged.
Sunlight: Performs best in full sun to part shade. While it can tolerate some shade, full sun exposure promotes the densest growth and best overall health.
Uses:
Privacy Screen: Green Giant arborvitae is commonly used as a fast-growing privacy screen or windbreak due to its dense foliage and rapid growth rate.
Landscape Ornamental: It is also used as a specimen tree in larger landscapes, parks, and commercial properties where its size and evergreen foliage provide year-round interest.
Container Planting: Can be grown in large containers or pots when young, though it will eventually outgrow most containers due to its size.
Maintenance:
Pruning: Minimal pruning is typically required beyond occasional shaping to maintain desired size or form. Prune in early spring before new growth begins.
Watering: Water regularly during the first few years after planting to establish a strong root system. Once established, it is moderately drought-tolerant.
Disease Resistance: Green Giant arborvitae is generally resistant to many pests and diseases, making it a low-maintenance choice for landscapes.
