Can You Prune An Arborvitae

You can prune an arborvitae, but only under the right conditions and with the correct technique.

Most homeowners believe that pruning an arborvitae is a simple task, but the truth is that these evergreen shrubs have unique growth habits that require a careful approach.

If you’ve been asking can you prune an arborvitae without causing permanent damage, the answer is a cautious yes, as long as you understand where the green growth ends and the brown wood begins.

In this post, we’ll explore how to prune an arborvitae safely, the best times to do it, and the common mistakes that could ruin your plant.

Let’s dig into everything you need to know about pruning an arborvitae so your shrub stays healthy and lush.
 

Why You Can Prune An Arborvitae the Right Way

You can prune an arborvitae when you follow a few golden rules that respect the plant’s natural structure.

The main reason you can prune an arborvitae is that these evergreens respond well to light, selective trimming that removes dead branches or controls size.

However, you can prune an arborvitae too aggressively, which leads to bare, brown patches that never grow back.

The key is to always leave some green foliage on each branch, because arborvitae cannot regenerate from old wood.

So yes, you can prune an arborvitae, but you must do it with a gentle hand and a sharp pair of shears.
 

1. Understanding Where Growth Occurs

When you prune an arborvitae, you need to remember that new growth only appears on the outer green tips.

The interior of the shrub, which consists of brown, woody stems, will not sprout new leaves if you cut into it.

This is why you can prune an arborvitae only on the green parts that are still actively producing foliage.

If you cut back to bare wood, that section stays dead forever, leaving a permanent hole in your shrub.
 
This simple rule is the most important thing to remember when you prune an arborvitae for shape or size.
 

2. The Best Time to Prune an Arborvitae

Timing matters a lot when you decide to prune an arborvitae.

You can prune an arborvitae in late winter or early spring before the new growth season starts.

This is ideal because the plant is still dormant, and the cuts will heal quickly as the weather warms up.

You can also prune an arborvitae in early summer after the first flush of growth has hardened off.
 
Avoid pruning an arborvitae in late summer or fall, because the new cuts won’t have time to heal before frost arrives.
 
This can lead to winter damage, so always plan your pruning an arborvitae project around the calendar.
 

3. Tools That Make Pruning an Arborvitae Easy

To prune an arborvitae properly, you need the right gear.

Hand pruners work well for smaller branches, while loppers handle thicker limbs that are still green.

Hedge shears are great for shaping the outer foliage, but be careful not to get too close to the brown interior.
 
Always clean your tools with rubbing alcohol before you prune an arborvitae to prevent spreading diseases.
 
Sharp blades make clean cuts, which heal faster and reduce stress on your shrub.
 

Common Mistakes When You Prune An Arborvitae

Even though you can prune an arborvitae, many gardeners make errors that cost them their plant’s beauty.

Let’s look at the most frequent mistakes so you can avoid them when you prune an arborvitae in your yard.
 

1. Cutting Into Brown Wood

The biggest mistake is cutting too deep into the old, brown wood.

You can prune an arborvitae only on the green tips, so never trim beyond the foliage line.

Once you expose the brown interior, that section will not regrow, and you’ll be left with an unsightly gap.
 
If you accidentally cut into brown wood, there’s no fix, so always be conservative with your cuts.
 

2. Pruning an Arborvitae Too Often

You can prune an arborvitae once or twice a year, but any more than that stresses the plant.

Frequent shearing removes too much foliage, reducing the shrub’s ability to photosynthesize and store energy.
 
Instead, focus on light touch-ups rather than heavy cutting every few weeks.
 
Your arborvitae will thank you with dense, healthy green growth.
 

3. Ignoring the Natural Shape

When you prune an arborvitae, you should work with its natural pyramid or columnar shape.

Don’t try to force a round or square form that the plant doesn’t naturally have.

You can prune an arborvitae to maintain its size, but fighting its genetics leads to weak, thin branches.
 
It’s better to lightly trim the tips to encourage bushier growth rather than hacking away at the sides.
 

How to Prune An Arborvitae Step by Step

If you’re ready to prune an arborvitae, follow these simple steps for the best results.

First, walk around your shrub and identify any dead, diseased, or broken branches that need removal.

Next, step back and decide how much you want to reduce the height or width of the plant.
 
Then, make your cuts at a slight angle just above a healthy bud or side branch.
 
Always leave at least two inches of green growth beyond the brown wood to ensure regrowth.
 
For hedges, use a string line as a guide to keep the top and sides even as you prune an arborvitae.
 
Finally, water the shrub deeply after you prune an arborvitae to help it recover from the stress.
 
Feed with a balanced fertilizer in early spring to support new growth and maintain vibrant green color.
 

Dealing with Overgrown Arborvitae

What if your arborvitae has gotten way too big?

Well, you can prune an arborvitae that is overgrown, but you cannot cut it back to the ground.

The only option for severely overgrown shrubs is to prune an arborvitae gradually over multiple seasons.
 
Each year, remove about a third of the outer growth, allowing the plant to slowly shrink in size.
 
This gradual approach prevents shock and keeps the green foliage intact.
 
If the shrub is simply too large and beyond saving, you may need to replace it entirely, which is a hard truth but sometimes the best option.
 

So, Can You Prune An Arborvitae?

You can prune an arborvitae, but only with care and attention to its unique growth pattern.

You can prune an arborvitae to control size, remove dead branches, or shape it into a neat hedge.
 
However, you can never prune an arborvitae back to bare wood and expect it to recover.
 
Always work on the green tips, time your cuts for late winter or early spring, and use clean, sharp tools.
 
By following these guidelines, you can prune an arborvitae successfully and keep your landscape looking its best.
 
Remember, the goal is to prune an arborvitae lightly and often, not heavily and rarely.
 
So go ahead, grab your shears, and prune an arborvitae with confidence, knowing that your green friend will thrive with the right approach.