When planting Green Giant Arborvitae (Thuja standishii x plicata), proper spacing is crucial for their healthy growth and development. These fast-growing evergreen trees can reach heights of 40-60 feet with a spread of 12-20 feet, so adequate spacing ensures they have enough room to mature without overcrowding.
Spacing Guidelines:
For privacy screens or hedges: Plant Green Giants 5-6 feet apart. This spacing allows them to grow together and form a dense, cohesive barrier.
For individual specimen trees: Allow for a spacing of 8-12 feet between each tree. This provides ample room for their full, pyramidal shape to develop without competition.
Factors Influencing Spacing:
Soil quality: In rich, well-draining soil, Green Giants may grow slightly faster and require the wider spacing (8-12 feet) to avoid overcrowding.
Climate: In cooler climates with slower growth rates, you can space them slightly closer (6-8 feet).
Desired maturity size: If you want to keep them smaller through pruning, closer spacing (5-6 feet) is acceptable.
Planting Tips:
Dig holes twice as wide as the root ball and just as deep.
Amend the soil with compost or organic matter for improved drainage and nutrient content.
Water thoroughly after planting and regularly during the first growing season to establish a strong root system.
- Mulch around the base of the tree to retain moisture and suppress weeds.
Long-Term Care:
Water regularly during dry periods, especially during the first few years.
Fertilize in early spring with a balanced fertilizer formulated for evergreens.
Prune lightly in late winter or early spring to shape the tree and remove any dead or diseased branches.
Benefits of Proper Spacing:
Improved air circulation: Reduces the risk of disease and pest problems.
Adequate sunlight penetration: Ensures all parts of the tree receive sufficient light for healthy growth.
Prevents overcrowding: Allows each tree to reach its full potential size and shape without competing for resources.
Can I plant Green Giants closer together if I want a faster privacy screen?
+While planting closer (4-5 feet) will initially create a denser screen, it can lead to overcrowding and health issues in the long run. Stick to the recommended 5-6 feet spacing for a healthy and sustainable privacy hedge.
How long does it take for Green Giants to reach their full height?
+Green Giants are fast-growing trees, gaining 3-5 feet per year. They can reach their mature height of 40-60 feet within 20-30 years.
Are Green Giants deer resistant?
+Green Giants are considered moderately deer resistant. While deer may nibble on young growth, they are less likely to cause significant damage compared to other plants.
Can I plant Green Giants in containers?
+Due to their large size, Green Giants are not suitable for long-term container growth. They require ample root space and are best planted directly in the ground.
