How To
If you’ve ever wondered how tall your Emerald Green Arborvitae 🌲 could grow without some serious pruning, the answer might surprise you—this evergreen can reach a towering 15 to 20 feet if left unchecked. That’s taller than most basketball hoops, and it grows fast, too, especially in the first few years.
But here’s the good news: with the right care, you can easily keep it at a more manageable 10-foot height, perfect for hedges or privacy screens. The key lies in understanding its growth patterns and when to step in with your pruners. I’ll walk you through exactly how to control its height while keeping it healthy and lush.
Whether you’re a beginner gardener or a seasoned pro, knowing when and how to prune makes all the difference. We’ll cover the best times to trim, what tools to use, and even how climate and soil play a role in its growth. Let’s get your Emerald Green Arborvitae looking sharp without sacrificing its natural beauty.
Ready to take control? You’ll learn how to shape this fast-growing shrub into the perfect fit for your landscape—without letting it grow wild. Let’s dive in.
Emerald Green Arborvitae growth chart: height expectations by year
Your Emerald Green Arborvitae grows faster than you might expect, especially in its first few years. Without pruning, it can shoot up to 15 to 20 feet—that’s nearly the height of a two-story house! But with the right care, you can shape it to stay at a more manageable 10 feet, perfect for hedges or privacy screens.
The key to controlling its height lies in understanding its growth stages. In the first year, you’ll see it reach 2 to 3 feet. By year two, it can double that height, hitting 4 to 6 feet. This rapid growth continues, with year three bringing it to 8 to 10 feet—right around the height where many gardeners prefer to keep it.
Here’s where climate comes into play. If you’re in a warmer USDA Zone 7 or 8, your Emerald Green Arborvitae may grow even faster due to longer growing seasons. In cooler zones like Zone 5 or 6, growth slows slightly, but it still reaches maturity within 10 years.
Soil quality also impacts growth. Well-draining, slightly acidic soil (pH 6.0 to 7.0) helps it thrive, while poor soil can stunt its growth. If your soil is heavy clay or sandy, consider amending it with compost to encourage healthier, faster growth.
Sunlight is another critical factor. This evergreen loves full sun (6+ hours daily), but it can tolerate partial shade. In shadier spots, growth slows, and the foliage may become less dense. If you’re aiming for a 10-foot height, planting it in full sun will help you achieve that goal faster.
Here’s a quick visual guide to what you can expect each year, including how to adjust pruning based on growth rate:
| Year | Height Range (ft) | Pruning Tip | Climate Note |
|---|---|---|---|
| 1 | 2–3 ft | Minimal pruning; shape as needed | Fastest growth in warm zones |
| 2 | 4–6 ft | Light trimming to encourage bushiness | Cooler zones may slow growth slightly |
| 3 | 8–10 ft | Prune to maintain desired height | Ideal height for many gardeners |
| 5 | 12–15 ft | Regular height pruning required | Growth slows as it matures |
| 10 | 15–20 ft | Minimal pruning; focus on shape | Mature size reached |
If you’re aiming for a 10-foot height, start pruning in year 3 to control its growth. Use sharp pruners to trim back the top 1/3 of new growth in late spring or early summer. This encourages bushier growth and prevents it from shooting up too quickly.
One common mistake is pruning too late in the season. Avoid trimming after mid-August, as new growth won’t have time to harden off before winter. This can leave your Emerald Green Arborvitae vulnerable to cold damage and stunted growth the following year.
For the best results, combine pruning with proper watering and fertilization. A balanced fertilizer (10-10-10) applied in early spring will give it the nutrients it needs to grow strong and healthy. Pair that with deep watering once a week, and you’ll have a thriving shrub that stays at your desired height.
Remember, the goal isn’t just to keep it short—it’s to maintain its vibrant green color and dense foliage. With the right care, your Emerald Green Arborvitae will be the star of your landscape, whether it’s a privacy screen, hedge, or standalone focal point.
Step-by-step pruning schedule to maintain 10-Foot height
Pruning your Emerald Green Arborvitae at the right time ensures it stays at your desired 10-foot height without stunting growth or causing stress. This evergreen grows rapidly in spring and early summer, making late winter to early spring the ideal time to shape it. I’ve broken down the process into clear steps, so you can keep your plant healthy and looking its best.
Timing is everything—prune too early, and you risk encouraging new growth that won’t harden off before winter. Too late, and you might cut back growth that was already established for the season. Aim to prune just as new growth begins to sprout, usually in late February to early March in most climates.
Before you start, gather your tools: sharp pruning shears for small branches, loppers for thicker stems, and gloves to protect your hands. Always sterilize your tools with rubbing alcohol to prevent the spread of disease. I also recommend wearing safety glasses, as arborvitae branches can snap back unexpectedly.
🌱 Step-by-Step Pruning Guide
- Step 1: Assess the Shape – Stand back and observe your arborvitae. Look for areas where growth is uneven or branches are overcrowded. This helps you plan where to make cuts for a balanced look.
- Step 2: Start with Dead or Damaged Branches – Remove any dead, diseased, or crossing branches first. These can weaken the plant and disrupt its natural shape.
- Step 3: Thin Out the Interior – Focus on thinning branches from the inside of the plant to improve airflow and sunlight penetration. This prevents fungal issues and keeps the foliage dense.
- Step 4: Trim the Top for Height Control – To maintain a 10-foot height, cut back the top branches just above a leaf node or bud. Avoid cutting into old wood, as new growth may not form.
- Step 5: Shape the Sides Evenly – Use your shears to trim the sides of the arborvitae, keeping the cuts even and gradual. This creates a clean, uniform look perfect for hedges or privacy screens.
- Step 6: Clean Up – Remove all clippings from the base of the plant to prevent pests or disease. Dispose of them in a sealed bag or compost pile if they’re disease-free.
One common mistake I see is pruning too much at once, which can shock the plant. Never remove more than one-third of the foliage in a single session. If your arborvitae is overgrown, space out pruning sessions over 2-3 years to avoid stressing it.
After pruning, give your Emerald Green Arborvitae a deep watering to help it recover. Monitor it closely for the first few weeks, as new growth will be tender. If you notice yellowing leaves or stunted growth, you may have pruned too aggressively. Adjust your approach in the next session.
With consistent pruning, your arborvitae will stay lush, healthy, and at the perfect height for your landscape. The key is patience and precision—don’t rush the process, and always prioritize the plant’s health over aesthetics. Happy pruning! ✂️