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You prune arborvitae bushes by snipping back the green growth on the outer canopy during the right time of year, and that’s the simple secret to keeping them healthy and full.
Pruning arborvitae bushes isn’t rocket science, but it does require a gentle touch because these evergreens don’t regrow from old wood.
If you’ve been wondering how to prune arborvitae bushes without turning them into brown, bare sticks, you’re in the right place.
In this post, we’ll walk through the best timing, the right tools, and the exact techniques so you can prune arborvitae bushes with total confidence.
Let’s dig in and get those beauties shaped up.
When to Prune Arborvitae Bushes for the Best Results
The timing for how to prune arborvitae bushes is just as important as the cutting itself, and getting it wrong can stress your plant.
You should prune arborvitae bushes in late winter or early spring before new growth starts pushing out.
This window is ideal because the plant is still dormant, so the cuts heal quickly and new shoots emerge right where you trimmed.
You can also do light pruning in mid-summer, but avoid heavy cuts in late summer or fall.
When you prune arborvitae bushes in fall, the fresh cuts won’t harden off before frost, leaving them vulnerable to winter burn.
If you’re asking how to prune arborvitae bushes that are overgrown, early spring is still your best bet for a hard corrective trim.
Why Late Winter Works So Well
Pruning arborvitae bushes in late winter means the plant puts all its energy into the remaining buds when the season turns.
The bare patches you leave behind will fill in quickly with lush green growth by mid-spring.
Plus, you can see the structure clearly without leaves blocking your view, making it easier to spot dead or damaged branches.
This is the most forgiving time to prune arborvitae bushes because the plant is tough and resilient when dormant.
What About Summer Pruning?
Light summer pruning is fine if you just want to tidy up some stray shoots or maintain a formal hedge shape.
Just don’t remove more than a third of the foliage in one go, as that can shock the plant.
When you prune arborvitae bushes in summer, always do it early in the morning or late afternoon to avoid heat stress.
And remember, you can prune arborvitae bushes lightly all season, but save the big jobs for spring.
The Right Way to Prune Arborvitae Bushes Without Killing Them
Now, let’s get into the actual steps for how to prune arborvitae bushes so they stay green and full from top to bottom.
The golden rule is to never cut back into the brown, bare wood in the center of the plant.
Arborvitae only produce new growth from the green tips, so cutting into the dead zone leaves permanent holes.
When you prune arborvitae bushes, always find the green foliage and make your cuts just above that growth.
Step 1: Sterilize Your Tools First
Before you prune arborvitae bushes, clean your pruning shears or hedge trimmers with rubbing alcohol.
This prevents spreading diseases from other plants in your yard.
Sharp tools are equally important because ragged cuts invite pests and fungal infections.
A clean, sharp blade makes a smooth cut that heals fast, which is exactly what you want when you prune arborvitae bushes.
Step 2: Remove Dead and Damaged Branches First
Start by inspecting the whole bush and snipping out any brown, brittle, or broken branches at their point of origin.
When you prune arborvitae bushes, this first pass opens up the interior and improves airflow.
It also lets you see the shape you’re working with before you make any cosmetic cuts.
Make sure to cut back to a healthy side branch or the main trunk, never leaving stubs.
Step 3: Shape the Outer Canopy Gently
Now, step back and decide on your desired shape, whether that’s a narrow column, a globe, or a relaxed natural form.
You should prune arborvitae bushes by trimming only the green tips, not the inner wood.
Use hand pruners for smaller branches and hedge shears for larger sweeps, but keep cuts shallow.
Try to make the bottom of the bush slightly wider than the top so sunlight reaches the lower branches.
Step 4: Take Off No More Than One-Third
When you prune arborvitae bushes, never remove more than one-third of the total foliage in a single season.
Removing more than that can leave the plant too weak to recover and may expose it to sun scald.
If your bush is way too tall or wide, spread the pruning over two or three years.
That way, you prune arborvitae bushes gradually and keep them healthy during the entire process.
Common Mistakes When You Prune Arborvitae Bushes
Even experienced gardeners mess up when they prune arborvitae bushes, and it’s usually the same few errors.
The biggest mistake is cutting too deep into the brown wood, which I already mentioned, and it’s a fast way to ruin the plant.
Another mistake is pruning too late in the season, which leaves the cuts exposed to cold damage.
People also prune arborvitae bushes in the middle of a heatwave, stressing the plant even more.
Don’t Top Your Arborvitae
Topping, or cutting straight across the top of the bush, is a classic error that ruins the natural shape.
When you top, the top branches die back and turn brown, never recovering.
Instead, when you prune arborvitae bushes, taper the top so it’s slightly narrower than the base for a natural, tapered look.
This also keeps snow from weighing down and splitting the branches in winter.
Avoid Pruning During Drought
If your area is in a dry spell, hold off and prune arborvitae bushes only after a good rain or deep watering.
Pruning removes foliage that stores moisture, so the plant needs extra water to bounce back.
Check the soil moisture before you prune arborvitae bushes and water deeply a day or two beforehand.
So, How to Prune Arborvitae Bushes and Keep Them Beautiful?
You prune arborvitae bushes by making shallow cuts into the green growth during late winter or early spring.
You prune arborvitae bushes by never touching the brown inner wood, which can’t sprout new leaves.
You prune arborvitae bushes by removing dead branches first, then shaping the outer canopy gently.
And you prune arborvitae bushes by keeping your tools clean and cutting no more than one-third of the foliage.
If you follow these steps, your arborvitae will reward you with dense, vibrant growth all year long.
So grab your shears, wait for the right season, and go ahead and prune arborvitae bushes with the skill of a pro.
Your yard will thank you for the care, and those beauties will stay green and full for decades to come.