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How to prune overgrown arborvitae is easier than you might think and doing it can really bring your backyard greenery back to life.
If your arborvitae looks more like a wild hedge than a neat, lush tree, pruning overgrown arborvitae will help keep them healthy, attractive, and in the shape you want.
Pruning overgrown arborvitae also prevents them from becoming too dense and blocking sunlight, which can cause browning inside the foliage.
In this post, we’ll dive into how to prune overgrown arborvitae step-by-step, the best time to prune arborvitae, and tips to keep your arborvitae looking fresh all year round.
Why Prune Overgrown Arborvitae?
If you’re wondering why it’s important to prune overgrown arborvitae, it’s all about plant health and aesthetics.
1. Maintain Shape and Size
Overgrown arborvitae can lose their characteristic shape and become bulky or sparse in places.
Pruning overgrown arborvitae helps maintain the elegant, conical shape and keeps the plants at a manageable size for your landscape.
2. Improve Airflow and Sunlight Penetration
When arborvitae become too dense and tall, airflow and sunlight struggle to reach the inner branches.
Pruning opens up the foliage, which reduces the risk of disease, pest outbreaks, and browning foliage.
3. Encourage Healthy Growth
Pruning overgrown arborvitae stimulates new growth and revitalizes older branches that might be dying or weak.
It signals the plant to produce fresher, greener foliage for a lusher appearance.
4. Prevent Damage to Property and Other Plants
If your arborvitae is growing too tall or wide, branches might rub against your house, fences, or neighbor’s plants.
Pruning overgrown arborvitae stops this damage before it happens by controlling their size.
When Is The Best Time to Prune Overgrown Arborvitae?
Knowing when to prune overgrown arborvitae is just as important as knowing how to prune them.
1. Late Winter to Early Spring
The best time to prune overgrown arborvitae is late winter to early spring, just before new growth begins.
This timing lets you see the natural shape of the tree without leaves obscuring the view and encourages healthy new growth when spring arrives.
2. Avoid Heavy Pruning During Late Summer or Fall
Pruning overgrown arborvitae heavily in late summer or fall can stress the plants because they won’t have enough time to recover before winter’s cold sets in.
It may make the arborvitae more vulnerable to winter burn or damage.
3. Light Trimming Can Be Done In Summer
If you want to tidy your arborvitae, light trimming in summer is okay.
However, heavy cuts for overgrown arborvitae should wait until the dormant season.
How to Prune Overgrown Arborvitae Step by Step
Now that we understand the why and when, let’s look at how to prune overgrown arborvitae properly.
1. Gather Your Tools
Prepare sharp pruning shears, loppers, and possibly a pruning saw for thick branches.
Wearing gloves and protective glasses is a good idea to keep yourself safe during pruning.
2. Start by Removing Dead, Diseased, or Damaged Branches
Begin pruning overgrown arborvitae by cutting off any brown or dead branches you see.
Removing unhealthy branches first improves airflow and the overall health of the plant.
3. Thin Out Dense Foliage Inside the Tree
To prune overgrown arborvitae successfully, thin crowded interior branches to allow light and air to penetrate.
Be careful not to remove more than one-third of the foliage to avoid stressing the plant.
4. Trim Back Excess Height and Width
Use the pruning shears or loppers to shape the tree by gradually reducing height and width.
Cut back branches to a lateral bud or branch to help the arborvitae maintain a natural appearance.
5. Avoid Cutting Into Old Wood
It’s important when pruning overgrown arborvitae not to cut into old, leafless wood because arborvitae rarely grow back from bare branches.
Focus your cuts on green, leafy branches to encourage new growth.
6. Shape the Tree for Uniformity
Step back often during pruning to check your progress.
Aim for a nice tapered shape, which is typical of arborvitae.
A uniform profile with a wider base and narrower top encourages healthy growth and is visually appealing.
Tips for Maintaining Your Arborvitae After Pruning
Pruning overgrown arborvitae is just part of keeping them healthy — maintenance afterward is crucial for the best results.
1. Mulch and Water Regularly
After pruning overgrown arborvitae, apply a layer of mulch around the base to protect roots and preserve moisture.
Regular watering, especially during dry spells, supports recovery and healthy new growth.
2. Fertilize in Early Spring
Applying a balanced, slow-release fertilizer in early spring helps your arborvitae replenish nutrients lost during pruning.
It encourages strong, vibrant growth during the growing season.
3. Monitor for Pests and Diseases
Pruning overgrown arborvitae can sometimes expose plants to pests or disease.
Keep an eye out and treat any issues early to avoid long-term damage.
4. Regular Light Pruning
Make pruning a regular habit by lightly trimming your arborvitae annually.
Regular maintenance prevents overgrowth and reduces the need for drastic pruning in the future.
So, How to Prune Overgrown Arborvitae?
To prune overgrown arborvitae, start by doing it in late winter or early spring, using clean, sharp tools.
Focus first on removing dead or damaged branches, then thin out dense areas to improve airflow and sunlight penetration.
Avoid cutting into old wood, and carefully trim excess height and width to restore the plant’s natural shape.
Remember to care for your arborvitae after pruning with proper watering, mulching, and fertilizing to ensure a quick recovery.
Pruning overgrown arborvitae might seem intimidating at first, but with these steps, you can easily keep your trees healthy, beautiful, and just the right size for your garden.
With regular attention, your arborvitae will stay lush and vibrant, adding that perfect touch of greenery to your outdoor space all year long.