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You can trim an arborvitae in summer, but careful timing and technique are essential for success.
Trimming an arborvitae in summer is possible because the tree is in its active growing phase.
However, you need to avoid cutting into old wood, as that can leave bare patches that won’t regrow.
Knowing how to trim an arborvitae in summer correctly will keep your tree healthy and looking its best.
In this post, we’ll cover exactly how to trim an arborvitae in summer, the best tools to use, and what to avoid.
Let’s dive into the details of trimming arborvitae in summer so your tree thrives.
How to Trim an Arborvitae in Summer: The Right Approach
1. Trim Only the Green Growth
When you trim an arborvitae in summer, focus only on the green outer foliage.
Arborvitae don’t regrow from brown inner wood, so cutting into that will leave permanent bald spots.
Always make your cuts just above a side branch or a set of healthy green needles.
This encourages dense, bushy growth and prevents unsightly gaps.
It’s better to make several small cuts than one large cut to maintain the natural shape.
Look for the boundary between the green needles and the brown interior before making any cut.
2. Prune Lightly and Often
Instead of taking off large chunks, trim an arborvitae in summer by removing no more than one-third of the green growth.
Heavy pruning stresses the tree and can lead to dieback.
Summer is the ideal time for light shaping because the tree can recover quickly.
Thin out crowded branches to improve airflow and reduce disease risk.
A light trim every few weeks during the growing season keeps the shape tidy.
Over-pruning at once can shock the tree and slow its growth.
3. Shape Gradually Over Multiple Seasons
If your arborvitae has grown too large, don’t try to fix it all in one summer.
Trim an arborvitae in summer by cutting back a little each year to achieve your desired shape.
This gradual approach keeps the tree healthy and avoids shocking it.
Patience is key when learning how to trim an arborvitae in summer properly.
Each season you can refine the silhouette without risking permanent damage.
Planned yearly trims are more sustainable than one drastic cut.
Best Tools for Trimming an Arborvitae in Summer
1. Hand Pruners for Precision
For small branches and detailed shaping, use sharp bypass pruners.
They make clean cuts that heal quickly, which is crucial when you trim an arborvitae in summer.
Avoid anvil pruners as they can crush the stems.
Clean, precise cuts reduce stress and promote faster recovery.
2. Hedge Shears for Larger Areas
If you have a long row of arborvitae, hedge shears speed up the job.
Use them to shear the outer surface evenly when you trim an arborvitae in summer.
Be careful not to go too deep, as hedge shears can accidentally cut into old wood.
Shearing is great for formal hedges but requires a steady hand.
3. Pole Pruners for Taller Trees
For arborvitae that have grown tall, a pole pruner helps you reach the top safely.
When you trim an arborvitae in summer, always sterilize your tools with rubbing alcohol to prevent spreading diseases.
Sharp blades on any tool make cleaner cuts that heal faster.
Common Mistakes When You Trim an Arborvitae in Summer
1. Cutting Into Brown Wood
The biggest mistake when trimming arborvitae in summer is cutting into the inner brown branches.
These branches won’t regenerate green foliage, leaving your tree with permanent holes.
Always double-check your cuts to ensure you’re only removing green growth.
One wrong cut can ruin the appearance for years.
2. Pruning During a Heatwave
Trimming an arborvitae in summer during extreme heat can cause additional stress.
Wait for a cooler day or prune in the early morning to give the tree time to recover before the sun peaks.
Hydrate your tree well before and after you trim an arborvitae in summer.
Stress from heat can lead to browning and slower regrowth.
3. Over-Shearing the Top
Removing too much from the top creates a flat, unnatural look and weakens the structure.
When you trim an arborvitae in summer, maintain a slight taper so the bottom is wider than the top.
This allows sunlight to reach lower branches and keeps your arborvitae full and healthy.
A tapered shape also sheds snow better in winter.
Aftercare for Arborvitae After Summer Trimming
1. Water Deeply After You Trim an Arborvitae in Summer
After you trim an arborvitae in summer, give it a deep watering to support recovery.
Moist soil helps the tree manage the stress of pruning and encourages new growth.
Avoid overhead watering to keep foliage dry and prevent fungal issues.
2. Mulch Around the Base
Apply a layer of mulch around the base after trimming arborvitae in summer.
Mulch retains soil moisture and keeps roots cool during hot months.
Keep mulch a few inches away from the trunk to avoid rot.
3. Monitor for Pests
Fresh cuts can attract pests, so watch your tree after you trim an arborvitae in summer.
Spider mites and bagworms are common threats to arborvitae.
Early detection makes treatment much easier.
So, How to Trim an Arborvitae in Summer Correctly?
You can trim an arborvitae in summer by following a few key guidelines.
First, only cut into green foliage and avoid inner brown wood.
Second, use sharp, clean tools to make precise cuts.
Third, prune lightly and gradually over multiple years for the best results.
Knowing how to trim an arborvitae in summer will help you maintain a beautiful, dense tree that stays healthy year after year.
Remember that trimming arborvitae in summer is about delicate shaping, not heavy pruning.
With these tips, you can confidently trim an arborvitae in summer and enjoy a lush landscape.