Trees
Wondering how tall emerald green arborvitae do they grow before committing to your landscaping plan? This fast-growing evergreen can reach heights of 10–12 feet in ideal conditions, but many gardeners still wonder how quickly it climbs—and how to plan for its mature size.
If you’re envisioning a privacy screen or a statement hedge, understanding its growth rate is key. Unlike slower-moving shrubs, the Emerald Green Arborvitae grows 2–3 feet per year in the right conditions, meaning noticeable height gains within just a few seasons. But whether you’re in USDA Zone 6a or another region, factors like spacing, soil, and sunlight play a huge role in how tall it ultimately becomes.
In this guide, I’ll break down everything you need to know—from its growth trajectory by age to the best care tips for encouraging faster, healthier growth. Whether you’re a beginner or a seasoned gardener, these insights will help you plan your layout with confidence.
Let’s dive into how to maximize your Emerald Green Arborvitae’s potential while keeping your landscape design on track.
Emerald Green Arborvitae height by age: growth rate and mature size
The Emerald Green Arborvitae is one of the fastest-growing evergreens in its category, reaching a mature height of 15–25 feet under ideal conditions. Unlike slower-growing varieties, this semi-dwarf shrub can grow 1–2 feet per year in the right environment, making it a favorite for privacy screens and hedges. Understanding its growth progression helps you plan spacing and long-term landscaping goals.
In the first year, expect your Emerald Green Arborvitae to grow 2–3 feet tall. By year two, it typically doubles in height to 4–6 feet, establishing a strong root system. This rapid early growth is why many gardeners choose it for quick privacy solutions. However, its full potential depends on several factors, including soil quality, sunlight exposure, and watering habits.
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Emerald Green Arborvitae Height Progression
| Age | Height Range | Growth Rate | Key Notes |
|---|---|---|---|
| Year 1 | 2–3 ft | 1–2 ft/year | Establishes root system |
| Year 2 | 4–6 ft | 2 ft/year | Doubles in height |
| Year 3 | 8–12 ft | 1.5–2 ft/year | Rapid vertical growth |
| Year 5 | 10–15 ft | 1–1.5 ft/year | Approaches mature height |
| Mature (10+ years) | 15–25 ft | 0.5–1 ft/year | Slower growth; dense foliage |
🌲 Note: Growth rates vary by climate—warmer zones may see faster early growth.
By year five, your Emerald Green Arborvitae will likely reach 10–15 feet, making it an excellent choice for privacy hedges or windbreaks. The growth rate slows slightly as it matures, but it can still add 0.5–1 foot per year in optimal conditions. This means a 10-year-old specimen could easily top 20 feet, providing year-round greenery and wildlife habitat.
One common misconception is that all Emerald Green Arborvitae varieties grow to the same height. In reality, some compact cultivars (like 'Emerald Green Compact') max out at 8–12 feet, while standard varieties can reach 25 feet. Always check the specific cultivar label when purchasing to avoid surprises in your landscape design.
Climate plays a crucial role in height development. In USDA Zones 5–8, where this shrub thrives, you’ll see the fastest growth. Cooler northern climates may slow growth to 0.5–1 foot per year, while southern zones can push 2 feet per year in the early years. Proper soil drainage and mulching can also accelerate growth by reducing stress.
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To ensure your Emerald Green Arborvitae reaches its full height potential, plant it in well-draining soil with a slightly acidic pH (6.0–7.0). Amend heavy clay soil with compost or sand to improve aeration. When planting, place it 6 inches deeper than the root ball to encourage strong root development. Proper spacing is also key—give each plant 3–5 feet of clearance to prevent overcrowding, which can stunt growth.
Many gardeners wonder if pruning affects height. While regular pruning (2–3 times per year) helps maintain shape, it doesn’t significantly reduce height. In fact, light pruning after the first growing season can encourage denser foliage and slightly faster vertical growth. Avoid heavy pruning in late summer, as this can stress the plant and slow growth the following spring.
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For those using Emerald Green Arborvitae as a privacy screen, plan for 10–12 feet of height in 5–7 years under ideal conditions. If you’re planting multiple shrubs, space them 3–4 feet apart for a seamless, dense barrier. In contrast, using them as specimen plants allows for wider spacing (up to 6 feet) to showcase their natural shape.
Understanding the growth timeline helps you avoid common mistakes, like planting too close to structures or other plants. Always leave room for the mature height—a 25-foot shrub planted too close to a patio or driveway can become a maintenance nightmare. With the right care, your Emerald Green Arborvitae will not only reach impressive heights but also provide low-maintenance beauty for decades.
Emerald Green Arborvitae height by age: growth rate and mature size
The Emerald Green Arborvitae is a popular choice for landscaping, thanks to its striking emerald-green foliage and adaptable nature. But how tall will it grow? Unlike its towering cousins, this semi-dwarf variety typically reaches 10–12 feet at maturity—ideal for hedges, privacy screens, or focal points. However, growth rates vary based on climate, soil quality, and care, so understanding its height progression helps you plan effectively.
In the first year, expect your Emerald Green Arborvitae to grow 2–3 feet, establishing a sturdy foundation. By year two, it will likely double in height to 4–6 feet, showcasing its upright, columnar shape. The real growth spurt happens between years three and five, where it can add 3–4 feet annually under optimal conditions, reaching 8–12 feet by its fifth birthday.
| Age | Height Range | Growth Notes |
|---|---|---|
| Year 1 | 2–3 ft | Establishes root system; slow initial growth. |
| Year 2 | 4–6 ft | Rapid vertical growth; needs support if windy. |
| Year 3–5 | 8–12 ft | Peak growth phase; prune to maintain shape. |
| Mature (10+ years) | 10–12 ft | Growth slows; focus on maintenance pruning. |
After reaching 10–12 feet, the Emerald Green Arborvitae enters a slower growth phase, adding only 6–12 inches per year in ideal conditions. In cooler climates (USDA zones 3–6), growth may be slightly slower, while warmer zones (zones 7–9) can see faster early development. Always check your local USDA zone to adjust expectations—some gardeners in zone 8 report 12–15 feet in 5–7 years!
One common misconception is that all Arborvitae varieties grow equally tall. The Emerald Green is a semi-dwarf cultivar, meaning it stays shorter than standard types like Green Giant (which can hit 30–40 feet). This makes it perfect for urban gardens or smaller yards where space is limited. For reference, a 10-foot Emerald Green is roughly the height of a basketball hoop—ideal for creating a privacy screen without overwhelming your landscape.
To encourage faster growth, focus on well-draining soil, full sun exposure, and regular watering during the first two years. Mulching around the base helps retain moisture and suppresses weeds, which can compete for nutrients. Avoid over-fertilizing, as this can lead to sparse foliage or weak stems. Instead, use a balanced 10-10-10 fertilizer in early spring to support steady growth.
If you’re planning a hedge or windbreak, space your Emerald Green Arborvitae plants 3–5 feet apart to allow for natural spreading. Over time, their dense, columnar shape will create a lush, evergreen barrier that thrives year-round. With proper care, you’ll enjoy its vibrant color and structured form for decades—making it a low-maintenance yet high-impact addition to any garden.