A homeowner on Boise’s Bench called us last fall about a silver maple that had been topped three years earlier by another company. The tree was supposed to be “under control.” Instead, it had thrown out dozens of thin, fast-growing shoots from every cut point.
Those shoots were now longer than the original branches, weakly attached, and splitting apart in every windstorm. The tree was more hazardous than before the topping. The homeowner was facing a full removal bill that dwarfed what proper pruning would have cost in the first place.
So is tree topping bad? Yes. Every ISA-certified arborist will tell you the same thing. Topping is the single most harmful thing you can do to a mature tree. It causes decay, destroys the tree’s natural structure, and creates a cycle of weak regrowth that makes the tree less safe, not more.
If someone has told you to top your tree, or if a company has recommended it, this guide explains why that advice is wrong, what the real alternatives are, and how to spot a tree service you should avoid.
In this article:
- What tree topping actually is (and isn’t)
- Six reasons topping damages your tree
- What to do instead: crown reduction, thinning, and structural pruning
- Red flags that a tree company tops trees
- ANSI A300 standards and why they matter
- FAQs about tree topping in Boise
What Is Tree Topping?
Tree topping is the practice of cutting the main branches or trunk of a tree back to stubs or lateral branches too small to take over the terminal role. It goes by several names: heading, hat-racking, rounding over, or tipping.
Regardless of what someone calls it, the result is the same. You’re left with a tree that looks like a coat rack and is biologically stressed beyond its ability to recover normally.
Here is the clearest way to understand it: topping removes 50% to 100% of a tree’s leaf-bearing crown in a single cut. Leaves are how trees produce food through photosynthesis. Removing that much canopy is the equivalent of cutting off someone’s lungs and asking them to run a marathon.
Topping is not the same as professional pruning. Legitimate pruning follows established standards. It targets specific branches for specific reasons: clearance, weight reduction, deadwood removal, or structural improvement.
Topping is indiscriminate. It cuts everything back to an arbitrary height with no regard for branch structure, species biology, or long-term tree health.
In the Treasure Valley, the most commonly topped species we see are silver maples, cottonwoods, and Bradford pears. These are trees that grow fast, get large, and scare homeowners with their size, which makes them topping targets for companies that don’t know better (or don’t care).
Why Tree Topping Is Harmful: Six Reasons to Never Do It
If you’re wondering why not to top trees, the damage goes far deeper than an ugly silhouette. Here’s what actually happens after a tree gets topped.
1. Decay and Disease Move In
Every topping cut leaves a large, open wound. Unlike a proper pruning cut made at a branch collar, a topping cut slices through the middle of a branch or trunk. The tree cannot seal this wound effectively.
Decay fungi colonize the exposed wood within weeks. Over time, the rot works its way down the trunk and into the root system. What started as a “quick fix” becomes a structural time bomb.
2. Weak, Dangerous Regrowth
This is where tree topping damage really shows up. After topping, a tree goes into survival mode and activates dormant buds just beneath the bark. These produce epicormic shoots: fast-growing, thin branches that sprout in dense clusters from every topping cut.
Here’s the problem. These shoots are attached only to the outer bark layer, not anchored deep into the branch wood the way natural branches are. They grow fast, sometimes two to three feet per year on a stressed cottonwood in Boise.
Within a few seasons, the tree’s canopy is the same size it was before topping, except now it’s made of poorly attached branches that break in storms.
Mike, a homeowner in Eagle, learned this the hard way. He had a large cottonwood topped in 2022 because it was “getting too big.” By 2025, the regrowth was denser and heavier than the original canopy.
During a spring windstorm, three epicormic branches snapped off and landed on his fence and his neighbor’s car. His emergency tree service call cost more than the original topping job and the proper pruning he should have done combined.
3. Stress and Sunscald
A tree’s bark is adapted to the shade its own canopy provides. Remove that canopy through topping, and suddenly the trunk and remaining branch stubs are exposed to direct sunlight. In Boise’s hot summers, this causes sunscald: the bark cracks, peels, and dies on the sun-facing side. That damaged bark becomes another entry point for insects and disease.
The tree is also starving. With most of its leaves gone, it has to tap into stored energy reserves to push out emergency regrowth. If the tree was already stressed from drought, poor soil, or disease, topping can kill it outright.
4. It Makes the Tree Uglier
Let’s be direct. Nobody tops a tree to improve its appearance, but the result is hideous. A topped tree looks like a hat rack in winter and a stressed-out pom-pom in summer. The dense clusters of epicormic shoots create an unnatural, rounded blob that has nothing to do with the tree’s natural form.
If curb appeal or property value is part of your reasoning, topping does the opposite of what you want. Studies from the International Society of Arboriculture (ISA) show that mature, well-maintained trees can add 10% to 20% to a property’s value. A topped tree reduces that value.
5. It Shortens the Tree’s Life
Trees that are properly pruned can live for decades or even centuries. Topped trees rarely recover their original health. The cycle of topping, regrowth, and re-topping gradually depletes the tree’s energy reserves, introduces progressive decay, and weakens the structure beyond repair. Many topped trees in Boise eventually need full removal within 10 to 15 years, when they might have lived another 50 with proper care.
6. It Costs More in the Long Run
Topping creates a maintenance nightmare. The fast-growing regrowth means you’ll need to call someone back every two to three years to deal with the same problem, except now the problem is worse. Over a 10-year period, a homeowner who tops a tree will spend significantly more than one who invests in proper pruning once every three to five years.
Considering topping because your tree feels too large or too close to your house? Contact our arborists for a free assessment. We’ll tell you what your tree actually needs, and it’s almost never topping.
Tree Topping vs Pruning: What to Do Instead
If topping is off the table, what are the real options? The answer depends on what you’re trying to accomplish. Here are three legitimate approaches that achieve the results homeowners want without destroying the tree.
Crown Reduction Pruning
This is the direct alternative to topping. Crown reduction lowers a tree’s height or spread by cutting branches back to a lateral branch that’s large enough to assume the terminal role (at least one-third the diameter of the branch being removed). The result is a smaller tree that retains its natural shape and branch structure.
Crown reduction is how an arborist takes three to five feet off a silver maple that’s pushing into power lines without turning it into a stub factory. It’s slower and requires more skill than topping, which is why companies that lack training default to topping instead.
Crown Thinning
If the goal is reducing wind resistance, improving light, or lowering branch weight, crown thinning is the answer. This involves selectively removing interior branches throughout the canopy, typically no more than 15% to 20% of live growth. The tree keeps its shape but becomes more open, reducing the sail effect during Boise’s notorious spring windstorms.
Structural Pruning
For younger trees, structural pruning corrects problems early. This includes removing competing leaders, addressing weak branch unions, and establishing a strong central trunk. A few hundred dollars of structural pruning on a 10-year-old tree can prevent thousands in emergency removal costs 20 years later.
Quick Comparison: Topping vs. Proper Pruning
| Factor | Topping | Proper Pruning |
|---|---|---|
| Canopy removed | 50-100% | 15-20% max |
| Cut location | Random stubs | Branch collar |
| Regrowth quality | Weak, poorly attached | Strong, natural |
| Tree stress | Severe | Minimal |
| Decay risk | High (open wounds) | Low (sealed cuts) |
| Long-term cost | Higher (repeated work + removal) | Lower (every 3-5 years) |
| ANSI A300 compliant | No | Yes |
The key difference between tree topping vs pruning is intent and technique. Pruning works with the tree’s biology. Topping works against it.
How to Spot a Tree Company That Tops Trees
Not every company that shows up with a truck and a chainsaw knows what it’s doing. Tree topping in Boise is still common, and it’s almost always done by companies that lack proper training or credentials.
Red flags to watch for:
- They recommend topping as the first solution. A qualified arborist will discuss crown reduction, thinning, or removal before ever mentioning topping. If “we’ll just top it” comes out in the first conversation, walk away.
- They have no ISA certification. The International Society of Arboriculture certifies arborists who have demonstrated knowledge of proper tree care practices. ISA-certified arborists follow industry standards that explicitly prohibit topping.
- They can’t explain ANSI A300 standards. Ask any tree service you’re considering: “Do you follow ANSI A300 pruning standards?” If they don’t know what you’re talking about, they’re not following them.
- They offer unusually cheap estimates. Topping is fast. Proper pruning takes longer because it requires climbing, assessing each branch, and making targeted cuts. If one estimate is dramatically lower than the others, ask why.
- They show you photos of topped trees as examples of their work. This one speaks for itself.
At Boise Tree Pros, our arborists are ISA-certified and follow ANSI A300 standards on every job. We’ve been doing this in the Treasure Valley for over 15 years. If your tree needs work, we’ll tell you exactly what kind, and topping isn’t in our vocabulary.
What Are ANSI A300 Standards (and Why Should You Care)?
ANSI A300 is the set of national standards for tree care operations developed by the Tree Care Industry Association (TCIA). These standards cover everything from pruning and cabling to lightning protection and soil management. They represent the accepted best practices for professional tree care in the United States.
Here is what matters for homeowners: ANSI A300 explicitly states that topping is not an acceptable pruning practice. The standard defines proper pruning cuts, maximum removal percentages, and techniques that preserve tree health and structural integrity.
When a tree service tells you they follow ANSI A300 standards, they’re telling you they won’t top your trees, they’ll make proper cuts at branch collars, and they’ll remove no more canopy than the tree can handle. When a tree service doesn’t know what ANSI A300 is, you have no assurance that they’ll follow any standard at all.
Any company that claims to be professional should be able to discuss these standards. It’s one of the simplest ways to separate qualified arborists from someone who learned tree care on YouTube.
Boise-Specific Topping Concerns
Tree topping in Boise comes with extra risks because of our local conditions.
Wind. The Treasure Valley gets strong spring windstorms, sometimes with gusts over 50 mph. Topped trees with their dense clusters of weakly attached regrowth are far more likely to lose branches in these storms than properly pruned trees. We see this every March and April when the emergency calls spike.
Common species. Silver maples, cottonwoods, and Bradford pears are the trees we see topped most often in Boise. All three are fast growers with relatively brittle wood. Topping these species is especially harmful because they produce aggressive epicormic regrowth that compounds the structural weakness. A topped cottonwood in a North End yard is a liability waiting to happen.
Summer heat. Boise’s summer temperatures regularly hit the mid-90s. Sunscald from topping is a real concern here. Exposed bark on the south and west sides of topped trees dries out and cracks, inviting borers and other pests that thrive in Idaho’s warm months.
Property values. Boise’s real estate market puts a premium on mature landscaping. A well-maintained 40-year-old shade tree adds real value to your property. A topped tree covered in sucker growth does not.
FAQs About Tree Topping
Is tree topping bad for all tree species? Yes. There is no species that benefits from topping. Some species tolerate it slightly better than others (willows, for example, can regrow aggressively), but the structural damage, decay risk, and weakened attachment of regrowth applies universally. Proper pruning is always the better option.
Can a topped tree recover? It depends on how severely it was topped, how long ago, and the tree’s overall health. A tree topped once may recover with corrective pruning over several years by an ISA-certified arborist. A tree that has been topped repeatedly is often too far gone structurally. Our arborists can assess whether restoration is realistic or whether removal is the safer path.
My tree is too tall. What should I do instead of topping? Crown reduction pruning can lower a tree’s height by cutting back to appropriately sized lateral branches. This reduces height while preserving structure and appearance. If the tree is genuinely too large for its location and can’t be adequately reduced, professional removal and replanting with a species suited to the space may be the best long-term solution.
Is topping a tree illegal in Boise? Topping is not illegal in Boise for trees on private property. However, it violates ANSI A300 industry standards, and the ISA considers it a harmful practice. Some municipalities nationwide have begun restricting topping, but Boise has not enacted specific topping ordinances as of 2026. The fact that it’s legal doesn’t make it a good idea.
How much does proper pruning cost compared to topping? Proper pruning typically costs more per visit because it takes more time and skill. But over a 10-year period, you’ll spend less total because properly pruned trees need work only every three to five years, while topped trees need re-topping every two to three years plus eventual removal. The math favors doing it right the first time.
Will my homeowner’s insurance cover damage from a topped tree? If a topped tree fails and damages property, your insurer may argue that the tree was a known hazard, especially if an arborist had previously documented concerns. Maintaining trees to industry standards (ANSI A300) is the best way to protect yourself from both physical and financial risk.
The Bottom Line on Tree Topping
Tree topping is bad. Full stop. It causes decay, produces dangerous regrowth, stresses the tree, destroys its appearance, and costs more money in the long run. Every major arboricultural organization in the country, including the ISA and TCIA, advises against it.
If your tree feels too large, too close to your house, or too risky in windstorms, the answer is not topping. The answer is crown reduction, thinning, structural pruning, or in some cases, removal and replanting. These are the solutions that actually solve the problem instead of making it worse on a three-year delay.
Here’s what to do next:
- If you’ve been told to top a tree, get a second opinion from an ISA-certified arborist
- If your tree has already been topped, have it assessed for restoration or removal
- If you’re not sure what your tree needs, call for a free assessment
Boise Tree Pros has been caring for trees across the Treasure Valley for over 15 years. Our arborists are ISA-certified, ANSI A300 compliant, and backed by $2M in liability insurance. We don’t top trees. We take care of them.
Get your free estimate or call (208) 555-0192.