How To Keep Arborvitae From Splitting

To keep arborvitae from splitting, you need to address the main causes of trunk and branch fractures.
 
Splits often happen when heavy snow, ice, or wind puts too much pressure on weak crotches or V-shaped branches.
 
You can keep arborvitae from splitting by using proactive measures like proper staking, wrapping, and pruning.
 
In this post, we’ll break down why arborvitae split and exactly how to keep arborvitae from splitting all year round.
 
Let’s dig in.
 

How to Keep Arborvitae From Splitting: The Main Causes

Knowing what leads to splits is the first step in keeping arborvitae from splitting.
 
Here are the most common culprits and how to fix them:
 

1. Heavy Snow and Ice Loads

When snow piles up on multiple leaders, the weight can force them apart, causing a split.
 
To keep arborvitae from splitting under snow load, gently brush off wet snow with a broom.
 
For tall trees, consider tying the leaders together loosely before winter hits.
 
This simple practice goes a long way in how to keep arborvitae from splitting during storms.
 

2. Rapid Temperature Shifts and Frost Cracks

Sudden freezes after warm days can cause the bark to contract faster than the inner wood.
 
This thermal stress creates vertical splits called frost cracks, especially on young or thin-barked arborvitae.
 
To keep arborvitae from splitting due to temperature swings, wrap the trunk with tree wrap or burlap in late fall.
 
This insulation stabilizes the bark temperature and is a key technique for keeping arborvitae from splitting.
 

3. Poor Pruning Techniques

Cutting too close to the trunk or removing large branches can leave stubs that invite decay and splitting.
 
Another mistake is topping the tree, which forces weak, multiple leaders that later split apart.
 
To keep arborvitae from splitting after pruning, always cut at the branch collar and avoid removing more than one-third of the foliage.
 
Proper pruning is essential for how to keep arborvitae from splitting long-term.
 

Best Practices to Keep Arborvitae From Splitting

Now that you know the threats, here are the hands-on methods to keep arborvitae from splitting.
 

1. Stake Young Trees Correctly

When you first plant an arborvitae, staking helps the roots establish and keeps the trunk straight.
 
Use two or three stakes with soft ties, and never tie the trunk too tight.
 
This prevents wind from rocking the tree, which weakens the trunk and leads to splits.
 
Proper staking is a simple way to keep arborvitae from splitting while they mature.
 

2. Wrap the Trunk for Winter Protection

Tree wrap or burlap shields the bark from sunscald and temperature extremes.
 
Wrap from the base up to the first main branches, overlapping slightly as you go.
 
Remove the wrap in early spring to prevent moisture buildup and pests.
 
This wrapping technique is one of the most effective ways to keep arborvitae from splitting in cold climates.
 

3. Use Branch Bracing for Multiple Leaders

Arborvitae often grow with several vertical leaders that can pull apart in wind or snow.
 
To keep arborvitae from splitting, gently tie those leaders together with soft garden tape or wide nylon straps.
 
Space the ties about one-third and two-thirds of the way up the leaders.
 
Check the ties yearly and loosen them as the trunk widens to avoid girdling.
 

How to Keep Arborvitae From Splitting Long-Term

For lasting success, incorporate these habits into your regular arborvitae care.
 

1. Choose Split-Resistant Varieties

Some arborvitae cultivars naturally resist splitting better than others.
 
Look for varieties like ‘Green Giant’ or ‘Emerald Green’ that have tighter branching and stronger stems.
 
Starting with a resilient variety makes keeping arborvitae from splitting much easier.
 
Ask your local nursery for recommendations suited to your climate.
 

2. Water Consistently, Especially in Drought

When arborvitae get too dry, the wood becomes brittle and more prone to cracking under stress.
 
Deep watering once a week during dry spells keeps the tissue flexible and strong.
 
Mulching around the base also helps retain soil moisture and regulate root temperature.
 
Consistent moisture is a foundational part of how to keep arborvitae from splitting.
 

3. Inspect and Maintain Annually

Each spring and fall, walk around your arborvitae and look for small cracks, loose ties, or damaged bark.
 
Catch a split early and you can brace it before it worsens.
 
Tighten any loose ties and replace worn winter wraps.
 
This yearly checkup is a simple routine for keeping arborvitae from splitting over the years.
 

So, How to Keep Arborvitae From Splitting?

To keep arborvitae from splitting, address the root causes: heavy snow, temperature swings, and improper pruning.
 
You can keep arborvitae from splitting by staking young trees, wrapping trunks in winter, and bracing multiple leaders.
 
Long-term habits like choosing resilient varieties and watering consistently also help keep arborvitae from splitting.
 
With these tips, you’ll protect your arborvitae’s structure and enjoy a healthy, split-free tree for years.
 
Happy gardening.