If you've noticed thin, fast-growing shoots sprouting around the base of your tree, you're likely dealing with tree suckers. While they may seem harmless at first, these shoots can quickly become a recurring problem, making your landscape look untidy and diverting valuable energy away from the tree's healthy growth.
The good news is that learning how to remove tree suckers is simple. With proper pruning techniques, a few basic tools, and regular maintenance, you can keep sucker growth under control and help your trees stay healthy, attractive, and strong for years to come.
What Are Tree Suckers?
Tree suckers are vigorous shoots that grow from a tree's root system, root collar, or lower trunk rather than from the main canopy.
Unlike healthy branches that contribute to the tree's structure, suckers compete with the tree by using water, nutrients, and stored energy. As a result, they often weaken the tree's overall health if left unmanaged.
How to Identify Tree Suckers
Tree suckers are usually easy to recognize because they:
- Grow straight upward
- Appear in clusters around the tree base
- Have lighter-colored, softer foliage
- Grow much faster than normal branches
- Often emerge several feet away from the trunk through underground roots
Young suckers are flexible and easy to remove, while older ones become woody and more difficult to control.
Tree Suckers vs. Water Sprouts
Although they look similar, tree suckers and water sprouts are different.
- Tree suckers grow from the roots or base of the trunk.
- Water sprouts develop on existing branches or along the trunk after heavy pruning or stress.
Both should generally be removed, but root suckers are often more persistent because they originate from the root system.
Trees That Commonly Produce Suckers
Some tree species naturally produce more suckers than others.
Common examples include:
- Crabapple
- Cherry
- Plum
- Apple
- Pear
- Lilac
- Aspen
- Poplar
- Elm
- Maple
Grafted ornamental trees—especially crabapples, flowering cherries, and fruit trees—are particularly prone to producing suckers below the graft union.
Why Do Trees Produce Suckers?
Suckers rarely appear without a reason. In most cases, they're a sign that the tree is responding to stress.
1. Environmental Stress
Common causes include:
- Drought
- Inconsistent watering
- Root damage
- Storm damage
- Soil compaction
- Construction near the root zone
When stressed, trees attempt to produce additional foliage to generate more energy, resulting in sucker growth.
2. Improper Pruning
Removing too much of the canopy at once forces the tree into survival mode.
Excessive pruning often triggers vigorous shoots around the trunk and roots as the tree tries to replace lost leaves.
3. Natural Growth Habit
Some species naturally spread through underground roots.
Aspens and poplars are famous for producing root suckers that may appear many feet from the original tree.
4. Grafted Trees
Many ornamental and fruit trees are grafted onto hardy rootstocks.
When the rootstock sends up shoots below the graft union, those shoots should be removed immediately. If allowed to grow, the rootstock can eventually dominate the desirable variety.
When Is the Best Time to Remove Tree Suckers?
The best time to remove suckers is as soon as you notice them.
Spring and early summer are ideal because:
- Shoots are still soft
- Removal is easier
- Less energy has been wasted
- Regrowth is easier to control
Waiting until suckers become woody makes them harder to remove completely and increases the likelihood they'll return.
Tools You'll Need
You only need a few basic gardening tools:
- Hand pruners
- Loppers
- Pruning saw (for larger suckers)
- Gardening gloves
- Rubbing alcohol or disinfectant
Always clean and disinfect pruning tools before and after use to reduce the spread of diseases.
How to Remove Tree Suckers Properly
Step 1: Inspect the Entire Tree
Walk around the tree and look carefully for sucker growth.
Check:
- Around the trunk
- Along exposed roots
- In nearby lawn areas
- Beneath mulch
Some root suckers may emerge several feet away from the parent tree.
Step 2: Expose the Base of the Sucker
If mulch or soil covers the sucker's attachment point, gently pull it back.
This allows you to cut the sucker where it actually originates, which greatly reduces the chance of regrowth.
Step 3: Cut Flush With the Root or Trunk
Using sharp pruners or loppers, remove the sucker as close as possible to its origin.
Avoid leaving stubs.
Small stubs contain dormant buds that often produce even more sucker growth.
A clean, flush cut delivers the best long-term results.
Step 4: Pull Young Shoots by Hand
Very young, green suckers can often be removed without tools.
Grip the shoot near its base and pull downward firmly.
This method sometimes removes dormant buds along with the shoot, reducing future regrowth more effectively than cutting alone.
Step 5: Clean Up and Monitor
Remove all cut shoots and debris around the tree.
Then continue checking the tree every few weeks during the growing season.
Regular maintenance prevents small suckers from becoming large problems.
How to Prevent Tree Suckers From Returning
Removing suckers solves the immediate issue, but preventing future growth requires addressing the underlying cause.
Water Deeply
Trees under drought stress produce more suckers.
Instead of frequent shallow watering, provide slow, deep watering every one to two weeks during dry weather.
Deep watering encourages stronger root development.
Protect the Root Zone
Avoid:
- Lawn mower damage
- String trimmer injuries
- Digging near roots
- Soil compaction
- Piling mulch against the trunk
Healthy roots reduce stress and discourage sucker production.
Prune Properly
Never remove more than 25% of the canopy during a single pruning session.
Over-pruning is one of the most common reasons trees produce vigorous sucker growth.
If major pruning is necessary, consider consulting a certified arborist.
Keep the Tree Healthy
Healthy trees naturally produce fewer suckers.
Maintain good growing conditions by:
- Watering consistently
- Fertilizing only when needed
- Applying mulch correctly
- Monitoring for pests and diseases
- Avoiding unnecessary root disturbance
Should You Use Herbicides?
Chemical sucker-control products are available, but they should be used with caution.
Because suckers remain connected to the parent tree through the root system, herbicides can move into the tree and damage healthy tissue.
This is especially risky for:
- Aspen
- Poplar
- Fruit trees
- Ornamental trees
For most homeowners, manual removal remains the safest and most effective solution.
If sucker growth becomes severe or persistent, consult a licensed arborist before using any chemical treatment.
Common Mistakes to Avoid
Avoid these common errors when removing tree suckers:
- Leaving stubs after pruning
- Using dull or dirty pruning tools
- Ignoring the underlying cause of sucker growth
- Over-pruning the tree canopy
- Damaging roots with lawn equipment
- Applying herbicides without professional guidance
Taking a little extra care during removal will significantly improve long-term results.
Final Thoughts
Tree suckers are a common issue, but they don't have to become a long-term problem.
Removing them early, making clean cuts at their point of origin, and reducing the stress that causes them are the most effective ways to keep your trees healthy.
Inspect your trees regularly throughout the growing season, especially if you have species known for producing suckers. With consistent care and proper pruning, you'll spend less time fighting unwanted shoots and more time enjoying a beautiful landscape.
Professional Tree Care in Denver
Tree suckers are often a symptom of larger tree health issues. At Mile High Lifescape, our experienced landscaping professionals provide expert tree care, shrub pruning, landscape maintenance, and complete outdoor renovations throughout the Denver area.
Whether you're dealing with persistent sucker growth, overgrown landscaping, or trees showing signs of stress, our team can help restore the beauty and health of your yard.
Contact Mile High Lifescape today for a FREE consultation, and let our Denver landscaping experts help you maintain a healthy, beautiful landscape all year long.
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