How Long Does It Take Emerald Green Arborvitae To Grow

Emerald Green Arborvitae (Thuja occidentalis ‘Smaragd’) typically grows at a moderate pace, adding about 12 to 18 inches of height annually under ideal conditions. You can expect them to reach a significant screening height of 6-8 feet in approximately 4-6 years, ultimately maturing to 10-15 feet tall and 3-4 feet wide within 8-12 years, forming a dense, elegant evergreen privacy hedge.

Dreaming of a vibrant, evergreen privacy hedge that transforms your backyard into a serene sanctuary? Many homeowners envision the lush, columnar beauty of Emerald Green Arborvitae, a popular choice for its consistent color and classic form. But a common question arises: just how quickly will this botanical beauty deliver on its promise of a secluded oasis?

Understanding the growth rate of any plant is crucial for successful landscaping. It helps you set realistic expectations and plan your garden’s future effectively. Without this knowledge, you might find yourself waiting longer than anticipated or, conversely, over-pruning a fast grower.

This comprehensive guide will delve into the specifics of how long does it take emerald green arborvitae to grow, exploring the factors that influence its development and providing expert tips to maximize its potential. We’ll equip you with the knowledge to cultivate a thriving, fast-growing hedge, ensuring your landscaping dreams become a beautiful reality.

Understanding the Growth Rate: how long does it take emerald green arborvitae to grow

The Emerald Green Arborvitae, scientifically known as Thuja occidentalis ‘Smaragd’, is celebrated for its elegant, narrow pyramidal shape and vibrant green foliage. It’s a fantastic choice for creating natural screens, borders, or accent plants in your landscape.

Its growth rate is generally classified as moderate. This means it’s not a slowpoke, but it won’t shoot up like a willow either. On average, healthy Emerald Green Arborvitae plants will add 12 to 18 inches of vertical growth each year.

This annual growth allows them to reach a practical screening height relatively quickly. Within 4-6 years, you can typically expect your plants to be 6-8 feet tall, offering a good level of privacy. For a truly dense, mature hedge reaching its full potential of 10-15 feet, allow 8-12 years.

It’s important to remember that these are averages. Various environmental and care factors can significantly impact the actual growth rate. Providing optimal conditions is key to achieving the fastest possible growth.

Key Factors Influencing Emerald Green Arborvitae Growth

While Emerald Green Arborvitae has an inherent growth rate, its actual performance in your garden depends heavily on several critical factors. Understanding these elements allows you to create the best possible environment for vigorous growth.

Climate and USDA Hardiness Zone

Emerald Green Arborvitae thrives in USDA Hardiness Zones 3 through 7. Planting outside these zones can lead to stress, slower growth, or even plant failure. Extreme heat or cold can severely hinder its development.

Always check your local hardiness zone before selecting any plant. This ensures the species is well-suited to your region’s average minimum winter temperatures.

Sunlight Exposure Requirements

For optimal growth and the most vibrant green color, Emerald Green Arborvitae needs full sun. This means at least 6 hours of direct sunlight per day.

While it can tolerate partial shade, insufficient light will result in slower growth, sparser foliage, and a less dense habit. The plant may also become more susceptible to certain diseases in shadier conditions.

Soil Quality and Drainage

This arborvitae variety prefers well-draining soil that is rich in organic matter. A slightly acidic to neutral pH, ideally between 6.0 and 7.0, is best.

Heavy clay soils, which retain too much water, can lead to root rot – a common killer of arborvitae. Conversely, extremely sandy soils may drain too quickly, preventing roots from absorbing sufficient moisture and nutrients.

Water Availability and Consistency

Consistent moisture is vital, especially for young, establishing plants. Emerald Green Arborvitae does not tolerate prolonged drought or soggy conditions.

Proper watering promotes strong root development, which is the foundation for robust top growth. Deep, infrequent watering is generally better than shallow, frequent watering.

Nutrient Levels and Fertilization

Adequate nutrients are essential fuel for growth. A balanced fertilizer, particularly one formulated for evergreens, can significantly boost growth.

Look for fertilizers with an NPK ratio like 10-10-10 or a slightly higher nitrogen content (e.g., 16-4-8) for foliar growth. Soil testing can help you determine specific nutrient deficiencies in your garden.

Optimizing Planting for Rapid Establishment

The way you plant your Emerald Green Arborvitae sets the stage for its long-term health and growth rate. Proper planting techniques can dramatically reduce transplant shock and encourage quick establishment.

Choosing the Right Planting Time

The best times to plant Emerald Green Arborvitae are in the spring (after the last frost) or early fall (6-8 weeks before the first hard frost). These periods offer moderate temperatures and adequate rainfall, allowing roots to establish without extreme heat or cold stress.

Avoid planting in the peak of summer or winter. These conditions can be too harsh for newly transplanted shrubs.

Site Selection and Soil Preparation

Before digging, perform a drainage test. Dig a hole 12 inches deep, fill it with water, and see how long it takes to drain. If it takes more than 4 hours, your soil has poor drainage and needs improvement.

Amend heavy clay soils with organic matter like compost, aged manure, or pine bark fines to improve drainage and aeration. For sandy soils, compost will help improve water retention.

Digging the Planting Hole Correctly

Dig a hole that is twice as wide as the root ball and just as deep. The wider hole allows roots to easily spread into loosened soil, encouraging rapid outward growth.

Ensure the sides of the hole are not glazed or compacted, which can hinder root penetration. Rough up the sides with a spade if needed.

Proper Planting Depth

Plant your arborvitae so the top of the root ball is level with, or slightly above, the surrounding soil grade. Planting too deep can suffocate the roots and lead to trunk rot.

If the plant is balled and burlapped, remove all twine and as much burlap as possible, especially from the top and sides of the root ball. For container-grown plants, gently loosen any circling roots.

Backfilling, Watering, and Mulching

Carefully backfill the hole with the amended soil, gently tamping it down to remove large air pockets. Avoid compacting the soil too much, as this restricts root growth.

Water thoroughly after planting until the soil is saturated. This settles the soil around the roots.

Apply a 2-4 inch layer of organic mulch, such as shredded bark, pine needles, or compost, around the base of the plant. Keep the mulch a few inches away from the trunk to prevent moisture buildup and potential rot. Mulch helps retain soil moisture, suppress weeds, and regulate soil temperature.

Essential Care Practices to Boost Growth

Once planted, consistent and appropriate care is paramount for encouraging your Emerald Green Arborvitae to grow quickly and vigorously. Think of it as providing ongoing nourishment and protection.

Developing a Consistent Watering Regimen

For the first 1-2 growing seasons, newly planted arborvitae require consistent moisture. Water deeply once or twice a week, depending on rainfall and soil type. The goal is to moisten the entire root ball.

To check moisture, stick your finger 2-3 inches into the soil. If it feels dry, it’s time to water. Established plants are more drought-tolerant but still benefit from deep watering during dry spells. Drip irrigation systems are excellent for delivering consistent, targeted moisture.

Effective Fertilization Strategies

Fertilize in early spring before new growth begins, and again in mid-summer if desired. Use a balanced, slow-release granular fertilizer formulated for evergreens, such as a 10-10-10 or 12-4-8 NPK ratio.

Follow package instructions carefully to avoid over-fertilizing, which can burn roots. Alternatively, a layer of well-rotted compost spread around the base annually can provide a steady supply of nutrients.

Pruning for Health and Shape

Emerald Green Arborvitae generally requires minimal pruning. Light shaping can be done in late winter or early spring before new growth emerges.

Focus on removing any dead, damaged, or diseased branches. You can also lightly trim the tips of branches to encourage a denser, bushier appearance. Avoid cutting back into old, woody stems that have no green foliage, as these areas typically will not regrow. Use sharp, clean pruners for precise cuts.

Pest and Disease Management

Vigilance is key. Regularly inspect your plants for signs of pests like spider mites or bagworms, and diseases such as root rot or fungal issues.

Spider mites can cause foliage to appear stippled or bronzed. A strong spray of water or horticultural oil can help.
Bagworms create distinctive, cone-shaped bags. Hand-picking them off is effective for small infestations.
Root rot is often a symptom of poor drainage and overwatering. Ensure proper soil conditions.

Prevention through good cultural practices (proper watering, air circulation, healthy soil) is your best defense. If chemical treatments are necessary, always read and follow label instructions precisely, wearing appropriate safety gear like gloves and eye protection.

Winter Protection Measures

In colder zones or exposed sites, young Emerald Green Arborvitae can benefit from winter protection.

Wrap plants in burlap to protect against harsh winds and winter burn (desiccation).
Water thoroughly before the ground freezes to ensure roots are hydrated.
Avoid applying de-icing salts near the plants, as salt spray can cause significant damage.

Common Challenges and Troubleshooting Slow Growth

Even with the best intentions, your Emerald Green Arborvitae might not grow as fast as you’d hoped. Identifying the problem quickly is the first step to getting your plants back on track.

Yellowing Foliage

Yellowing can indicate several issues.

Overwatering or Underwatering: Both extremes stress the plant. Check soil moisture before watering.
Nutrient Deficiency: A lack of essential nutrients like nitrogen or iron can cause yellowing. A soil test can confirm this.
Winter Desiccation: Cold, dry winds can pull moisture from needles, leading to a yellow-brown cast.

Brown Tips or Browning Foliage

Browning is often a sign of stress.

Drought Stress: Prolonged lack of water, especially during hot, dry periods.
Salt Damage: From road salt spray or over-fertilization.
Winter Burn: Similar to desiccation, but often more severe, leading to crispy brown foliage.
Fungal Diseases: Can cause localized browning or blight.

Sparse or Stunted Growth

If your arborvitae looks thin or isn’t gaining height, consider these factors.

Insufficient Sunlight: Not enough light will naturally slow growth.
Poor Soil Conditions: Compacted soil, poor drainage, or nutrient-poor soil.
Root Issues: Damaged roots from transplant shock, girdling roots, or root rot.
Pest Infestation: Severe infestations can divert the plant’s energy, hindering growth.

Pest Infestations and Diseases

Regular inspection helps catch problems early.

Spider Mites: Tiny pests that suck plant sap, causing stippling. Look for fine webbing.
Bagworms: Caterpillars that build protective cases from plant material. They defoliate plants.
Aphids: Small, soft-bodied insects that cluster on new growth.
Root Rot: Caused by overly wet soil, leading to wilting and eventual plant death.

For pest issues, consider organic solutions like insecticidal soap or horticultural oil first. For diseases, improving cultural conditions (drainage, air circulation) is often the best preventative and curative measure. Consult a local extension office for severe or undiagnosed problems.

Achieving a Dense Privacy Screen: Spacing and Pruning

The ultimate goal for many planting Emerald Green Arborvitae is a lush, impenetrable privacy hedge. Achieving this requires careful planning regarding spacing and strategic pruning.

Optimal Spacing for a Dense Hedge

To create a solid privacy screen, plant Emerald Green Arborvitae closer together than you would for individual specimens. For a dense hedge, space them 2 to 3 feet apart, measuring from the center of one plant to the center of the next.

If you desire a slightly less formal, more natural look, you can increase the spacing to 4-5 feet. Remember, closer spacing means the plants will grow into each other faster, forming a seamless wall of green.

Single Row vs. Staggered Planting

Most privacy hedges are planted in a single, straight row. This is effective and creates a clean line.

For an even denser, faster-filling screen, especially in wider areas, consider a staggered or double-row planting. Plant the first row, then offset the second row by placing plants in the gaps of the first row. This technique fills in the space more quickly and provides superior visual blockage.

Initial Pruning for Shape and Density

When your young arborvitae are establishing, minimal pruning is needed. Focus on letting them grow and fill out.

Once they reach your desired height and begin to fill in laterally, you can start light shaping. Trim only the tips of the branches (no more than 1/4 to 1/3 of the new growth) to encourage branching and a denser habit. Avoid cutting back into old wood, as Emerald Green Arborvitae does not readily regenerate from leafless stems.

Maintenance Pruning for Long-Term Health

Annual maintenance pruning, typically done in late winter or early spring, helps maintain the desired shape and size of your hedge. Use sharp hedge shears or hand pruners.

Always prune the top narrower than the bottom, creating a slightly conical shape. This ensures that sunlight reaches the lower branches, preventing them from becoming sparse or brown. Regularly remove any dead, damaged, or diseased branches to promote overall plant health and vigor.

FAQ: Your Emerald Green Arborvitae Questions Answered

Here are some common questions homeowners ask about growing Emerald Green Arborvitae.

Q1: Can I plant Emerald Green Arborvitae in containers?

Yes, you can plant Emerald Green Arborvitae in containers, especially when they are young. Choose a large container with excellent drainage. However, they will grow much slower than in the ground and will eventually outgrow their pot, requiring repotting or transplanting. Ensure consistent watering, as container plants dry out faster.

Q2: How often should I water newly planted arborvitae?

For the first year or two, water newly planted Emerald Green Arborvitae deeply 1-2 times per week, especially during dry spells. The goal is to keep the soil consistently moist but not waterlogged. Always check the soil moisture with your finger before watering; if the top 2-3 inches feel dry, it’s time to water.

Q3: What’s the best time of year to fertilize Emerald Green Arborvitae?

The best time to fertilize Emerald Green Arborvitae is in early spring, just as new growth begins. You can also apply a lighter dose in mid-summer if your plants show signs of nutrient deficiency. Avoid fertilizing late in the season (after late summer), as this can promote tender new growth that is vulnerable to winter damage.

Q4: Will deer eat Emerald Green Arborvitae?

Unfortunately, deer do browse Emerald Green Arborvitae, especially during harsh winters when other food sources are scarce. While not their top choice, they will certainly nibble if hungry. Consider deer repellents, fencing, or wrapping young plants in burlap during winter to protect them from browsing.

Q5: How tall will Emerald Green Arborvitae get?

Emerald Green Arborvitae typically reaches a mature height of 10 to 15 feet and a width of 3 to 4 feet. This growth usually occurs over an 8-12 year period. With consistent care, they can form a stately, dense screen within your landscape.

Conclusion

Cultivating a magnificent Emerald Green Arborvitae hedge is a rewarding endeavor that significantly enhances your home’s privacy and aesthetic appeal. While patience is certainly a virtue, understanding how long does it take emerald green arborvitae to grow and implementing proper care strategies can significantly accelerate its development.

By providing optimal sunlight, well-draining soil, consistent moisture, and appropriate nutrition, you empower your plants to reach their full potential. Remember to plant correctly, prune judiciously, and remain vigilant against pests and diseases.

With these expert insights and a little consistent effort, you’ll soon enjoy a lush, vibrant, and dense evergreen screen that transforms your outdoor space into the private haven you’ve always dreamed of. Happy gardening!

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Taylor Galla

Founder and Author at Gardenaider

Taylor Galla is an American website author, product spokesman, mechanical engineer, automotive enthusiast, and automotive modifier.