Emerald green arborvitae typically reach a mature height between twelve and fifteen feet in residential landscapes. But how tall do emerald green arborvitae grow in different conditions? This is a common question for homeowners planning their privacy screens or garden borders.
These evergreens are popular for their narrow, pyramidal shape and vibrant green color. They grow slowly and steadily, making them easy to manage. Understanding their final height helps you space them correctly and avoid future overcrowding.
In this guide, we cover everything about their growth, from ideal conditions to common mistakes. You will learn exactly what to expect from your trees over the years.
How Tall Do Emerald Green Arborvitae Grow
Under ideal conditions, emerald green arborvitae reach 12 to 15 feet tall at maturity. This usually takes 10 to 15 years. Some trees may grow slightly taller, up to 18 feet, but this is rare in typical yards.
Their width stays between 3 and 4 feet, giving them a compact, columnar shape. This makes them perfect for tight spaces where you want vertical interest without taking up too much ground area.
Growth rate averages about 1 to 2 feet per year when young. After the first few years, the rate slows down as the tree approaches its maximum height.
Factors That Affect Final Height
Several things influence how tall your arborvitae will actually get. Not all trees reach the same height, even if they are the same variety.
- Soil quality: Rich, well-draining soil promotes better growth. Poor soil can stunt height.
- Sunlight: Full sun (6+ hours daily) gives the best results. Shade reduces growth rate and final size.
- Water availability: Consistent moisture is key. Drought stress limits height.
- Climate zone: They thrive in zones 3 through 8. Extreme heat or cold can slow growth.
- Spacing: Crowded trees compete for resources and may not reach full potential.
Typical Growth Timeline
Knowing the timeline helps you plan your landscape. Here is what you can expect year by year.
- Year 1: The tree establishes roots. Height increase is minimal, maybe 6 to 12 inches.
- Years 2-3: Growth picks up to 1 to 2 feet per year. The tree starts filling out.
- Years 4-6: Rapid growth phase. You may see 2 feet per year if conditions are ideal.
- Years 7-10: Growth slows to about 1 foot per year. Height reaches 10 to 12 feet.
- Years 10-15: Maturity. Height stabilizes around 12 to 15 feet. Width remains 3 to 4 feet.
Comparing Emerald Green Arborvitae To Other Varieties
It helps to see how this variety stacks up against others. This ensures you pick the right tree for your space.
Emerald Green Vs. Green Giant
Green Giant arborvitae grow much taller, reaching 40 to 60 feet. They also spread wider, up to 15 feet. If you need a tall, fast-growing screen, Green Giant is better. For smaller yards, emerald green is ideal.
Emerald Green Vs. Techny
Techny arborvitae grow 10 to 15 feet tall but are wider, around 6 to 8 feet. They have a broader, more rounded shape. Emerald green stays narrower, making it better for tight rows.
Emerald Green Vs. Degroot’s Spire
Degroot’s Spire is a dwarf variety, reaching only 8 to 10 feet tall. It is even narrower, about 2 to 3 feet wide. If space is extremely limited, consider this option instead.
How To Encourage Maximum Height Growth
You want your emerald green arborvitae to reach their full potential. Follow these steps for best results.
Plant In The Right Location
Choose a spot with full sun and good drainage. Avoid low areas where water pools. Dig a hole twice as wide as the root ball but no deeper. The top of the root ball should be level with the ground.
Water Consistently
Water deeply once a week during the first year. After that, water during dry spells. Aim for 1 to 2 inches of water per week, including rainfall. Mulch around the base to retain moisture.
Fertilize Sparingly
Too much fertilizer can cause weak, leggy growth. Use a balanced, slow-release fertilizer in early spring. Follow package directions. Over-fertilizing can also burn roots.
Prune Only When Needed
Emerald green arborvitae need little pruning. Remove dead or damaged branches in early spring. Do not cut into old wood, as it may not regrow. Light trimming of the tips can encourage denser growth.
Common Mistakes That Limit Height
Avoid these errors to keep your trees healthy and tall.
- Planting too deep: Burying the trunk causes rot and stunts growth.
- Overwatering: Soggy soil leads to root rot. Let the soil dry slightly between waterings.
- Underwatering: Drought stress stops growth and can kill the tree.
- Ignoring pests: Bagworms and spider mites can damage foliage and slow growth.
- Poor spacing: Planting too close together limits root expansion and height.
Can You Control The Height Of Emerald Green Arborvitae?
Yes, you can manage their height to some extent. However, they have a natural limit you cannot exceed. You can keep them shorter by pruning the top, but this may ruin their natural shape.
If you need a shorter hedge, consider dwarf varieties instead. Topping an arborvitae often leads to unsightly, bushy growth at the cut point. It is better to let them grow naturally.
Shearing For Height Control
If you must limit height, shear the top in early spring. Remove no more than one-third of the current year’s growth. This keeps the tree looking full while slowing upward growth.
Using Them As A Hedge
For a privacy hedge, space them 3 to 4 feet apart. This allows them to grow together without competing. They will reach their full height over time, creating a dense screen.
What Happens If They Outgrow Their Space?
Sometimes trees exceed expectations. If your emerald green arborvitae outgrow their spot, you have a few options.
- Transplant: Young trees (under 5 feet) can be moved in early spring or fall. Dig a wide root ball and replant immediately.
- Replace: For large trees, removal and replacement may be easier. Choose a smaller variety next time.
- Prune back: Trim sides and top, but be careful not to overdo it. Severe pruning can kill the tree.
Frequently Asked Questions
How tall do emerald green arborvitae grow in containers?
In containers, they typically stay smaller, reaching 6 to 8 feet tall. Root restriction limits their growth. Use a large pot (at least 18 inches wide) for best results.
How fast do emerald green arborvitae grow per year?
They grow 1 to 2 feet per year on average. Young trees grow faster, while mature trees slow down. Optimal conditions can boost growth to 2 feet annually.
Can emerald green arborvitae grow in shade?
They can tolerate partial shade but will grow slower and may not reach full height. Full sun is best for maximum growth. In deep shade, they may become thin and leggy.
Do emerald green arborvitae stay green in winter?
Yes, they retain their color year-round. However, they may bronze slightly in harsh winters. This is normal and reverses in spring. Proper watering helps prevent bronzing.
How close to a house can I plant emerald green arborvitae?
Plant them at least 3 to 4 feet from the house. This gives room for their mature width and allows air circulation. Closer planting can cause moisture issues against the wall.
Final Thoughts On Height Expectations
Emerald green arborvitae are reliable, low-maintenance evergreens for most landscapes. Knowing how tall they grow helps you plan effectively. With proper care, they will reach 12 to 15 feet in a decade or so.
Remember to give them full sun, consistent water, and good soil. Avoid common mistakes like overwatering or planting too deep. Your trees will reward you with years of beauty and privacy.
If you are still unsure about spacing or placement, measure your area first. Consider the mature height and width before planting. This prevents future headaches and keeps your landscape looking great.
Now you have all the information you need to answer the question: how tall do emerald green arborvitae grow. Use this guide to make informed decisions and enjoy your trees for years to come.