How Fast Does The Emerald Green Arborvitae Grow
The Emerald Green Arborvitae (Thuja occidentalis ‘Smaragd’) typically grows at a moderate rate of 6 to 12 inches per year under ideal conditions. With proper soil health, consistent moisture, and full sun, these evergreens reach a mature height of 12 to 15 feet within 15 to 20 years.
Are you looking for a way to turn your backyard into a secluded sanctuary without waiting decades for a tree to mature? Many homeowners wonder how fast does the emerald green arborvitae grow because they need a reliable, evergreen privacy fence that looks professional and stays dense year-round.
In this guide, we will break down the growth cycle of this popular conifer and explain the environmental factors that either accelerate or stunt its progress. By understanding the specific needs of these trees, you can transform your landscape into a lush, green barrier faster than you might expect.
Understanding how fast does the emerald green arborvitae grow
When you plant a young Emerald Green Arborvitae, you are making a long-term investment in your property’s aesthetic. In the first year, growth often appears slow as the tree focuses its energy on developing a robust root system to anchor itself in the soil.
Once established, usually by the second or third year, you will notice a more consistent vertical increase. While some cultivars are marketed for rapid growth, this specific variety prioritizes compact, dense foliage over aggressive, spindly height gains.
On average, you can expect a steady gain of about 6 to 12 inches annually. If your trees are growing significantly slower than this, it is often a sign of competition for resources or improper site conditions that need your immediate attention.
Environmental factors influencing growth rates
Even if you buy a healthy specimen, the environment is the ultimate controller of your arborvitae’s speed. Sunlight is the primary driver of photosynthesis, and these trees perform best when they receive at least six to eight hours of direct sun daily.
Soil quality plays a massive role in how fast your arborvitae reaches its potential. These plants prefer well-draining, slightly acidic soil that retains enough moisture to sustain the foliage without waterlogging the delicate feeder roots.
If you have heavy clay soil, your trees may struggle to expand their roots. We recommend incorporating organic matter or compost during planting to improve soil structure, which encourages faster growth and better nutrient uptake.
Essential care for maximum growth speed
Watering is the most critical maintenance task for a young arborvitae. During the first two growing seasons, ensure the root ball remains moist but not saturated, as drought stress is the number one cause of stunted growth and browning needles.
Mulching is a landscaper’s secret for consistent growth. Apply a 2- to 3-inch layer of shredded bark mulch around the base of the tree, keeping it a few inches away from the trunk to prevent decay. This regulates soil temperature and helps retain the moisture your tree desperately needs.
Fertilization should be handled with care. Use a balanced, slow-release fertilizer with an NPK ratio like 10-10-10 in early spring. Avoid heavy nitrogen applications late in the season, as this forces tender, late-summer growth that is highly susceptible to frost damage.
Common challenges and troubleshooting
One of the most common issues gardeners face is needle browning during the winter months. This is often caused by winter desiccation, where the tree loses moisture faster than it can replace it from frozen soil.
To prevent this, ensure your trees are deeply watered late into the autumn before the ground freezes. Applying an anti-desiccant spray can also help seal in moisture and protect the foliage from drying winds during harsh winters.
Keep an eye out for pests like spider mites or bagworms, which can strip foliage and halt growth. If you spot webbing or small, cone-like structures hanging from the branches, treat the infestation immediately with an appropriate horticultural oil or insecticide to keep your screen healthy.
Designing for density and privacy
Spacing is vital when you are planning your privacy screen. If you plant them too far apart, you will never achieve that solid wall effect; if you plant them too close, they will compete for light and nutrients, slowing their overall growth.
For a dense, continuous hedge, space your Emerald Green Arborvitae roughly 2 to 3 feet apart on center. This allows each tree enough room to fill out its sides while creating a unified, overlapping appearance that blocks out neighbors or traffic noise.
Remember that this variety is naturally narrow and upright. You do not need to prune them to maintain their shape; in fact, heavy pruning can expose older, non-foliated wood that will not grow back, permanently damaging the tree’s appearance.
Comparing cultivars for your landscape
While the Emerald Green is a favorite, it is worth comparing it to other varieties if you have specific space constraints. For instance, the Green Giant is a hybrid that grows much faster, often gaining 2 to 3 feet per year, but it grows significantly larger and wider.
Choose the Emerald Green if you have a smaller urban or suburban lot and need a refined, manageable privacy screen. Choose the Green Giant only if you have massive acreage and need to fill a large space in a very short amount of time.
Safety and professional tips for DIYers
- Tool Safety: Always use sharp, sterilized pruning shears to avoid spreading plant pathogens.
- Chemical Safety: Wear gloves and protective eyewear when applying fertilizers or pest treatments.
- Root Health: Never plant deeper than the container; the root flare should be slightly visible at the soil surface.
Frequently Asked Questions
Can I make my arborvitae grow faster with extra fertilizer?
No, over-fertilizing can actually burn the roots and cause long-term damage. Stick to a balanced, slow-release formula once in the early spring for the best results.
Do these trees need to be pruned?
Minimal pruning is required. You can trim the very tips of the branches to maintain symmetry, but avoid cutting into the thick, inner wood as it will not sprout new growth.
How do I know if my tree is getting enough water?
Check the soil 2 inches below the surface. If it feels dry to the touch, it is time to water. Yellowing needles are often a sign of either too much or too little water.
Will they grow in the shade?
They prefer full sun. While they can tolerate partial shade, they will become “leggy” and lose their dense, privacy-providing structure if they don’t get enough light.
Conclusion
Now that you understand the growth habits of the Emerald Green Arborvitae, you can plan your landscaping project with confidence. While they may not grow overnight, their steady, reliable progress and low-maintenance nature make them the gold standard for residential privacy.
Focus on proper site preparation, consistent moisture, and protective mulching to give your trees the best start. With a little patience and the right care, you will have a thriving, lush green wall that adds value and beauty to your home for years to come.
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