Every year, we assess trees in Omaha's neighborhoods and see the same thing: Silver Maples, Cottonwoods, and occasionally even Oaks that were "topped" 5, 10, or 15 years ago. The results are always the same — clusters of weak, fast-growing water sprouts shooting up from the cut points, decay spreading downward from each wound, and a tree that's structurally more dangerous than before the work was done.
Topping is the practice of cutting large branches or the main trunk back to stubs — dramatically reducing the canopy to control height or size. It's still being offered by some companies in Omaha, usually framed as "height reduction" or "trimming." The homeowner sees a smaller tree afterward and thinks the job is done. The tree's slow deterioration isn't visible for years.
What Actually Happens After Topping
When a tree is topped, the large wounds created at each cut point cannot close properly. A branch cut down to a 4-inch stub leaves a 4-inch wound. Tree biology is designed to close wounds at branch collars — the natural attachment point where a branch meets a larger limb. When you cut back to a stub, there's no collar, no mechanism for closure, and the wound remains open.
Decay fungi enter immediately. The wood behind the cut begins to rot from the outside in, working its way down into the trunk. You won't see this for years, but a decade after topping, you'll often find that the tops of large stubs are hollow.
Meanwhile, the tree responds to the sudden loss of canopy by pushing out dozens of fast-growing water sprouts — vigorous, straight shoots that emerge from dormant buds around the cut points. These grow 3-6 feet per year, restoring the tree's canopy mass rapidly. But water sprouts have no taper, no branch collar, and are attached weakly to the trunk. They're structurally the most dangerous part of the tree, and they're exactly what topping creates.
Within 5-10 years, you have the same size canopy you started with, but now it's full of weakly-attached water sprouts growing from rotting stubs. The tree is significantly more likely to fail than before topping.
Why Companies Still Sell It
Topping is fast, cheap, and visually dramatic. A crew can top a large tree in 2-3 hours with chainsaws. There's no skill required to make a large cut — you just cut. The homeowner sees immediate results: the tree is small again.
The negative consequences play out over years, not days, so the company that did the topping is long gone. The structural failure, if it happens, looks like the tree's fault, not the crew's.
Some companies actively market topping under softened names: "hat-racking," "pollarding" (which is different — a legitimate practice when done correctly on appropriate species from a young age), "trimming back," or "dropping the crown." If a bid describes dramatically cutting your tree back to stubs, it's topping.
Red Flags When Hiring a Tree Service
Beyond topping bids, watch for these warning signs:
Spike use on live trees. Climbing spikes drive into the wood and leave wounds at every step. They're appropriate for tree removal (where wound closure doesn't matter) and completely inappropriate on any live tree that's being pruned. Ask any company you're considering whether they use spikes. If they say yes for pruning work, pass.
Unverifiable qualifications. Ask who will assess the tree, what credential or training they rely on, how you can verify it, and what written work specification will guide the crew. A company should distinguish its service experience from any independent professional credential.
Price alone. The cheapest bid usually reflects the cheapest work. Tree work requires training, proper equipment, and liability insurance. If a bid is dramatically lower than others, find out why.
The Right Alternative: Crown Reduction
If your concern is that a tree has grown too large — overhanging the house, blocking views, conflicting with power lines — the correct approach is crown reduction pruning, not topping.
Crown reduction makes cuts back to lateral branches that are at least 1/3 the diameter of the limb being removed. This preserves branch collars, maintains the tree's natural form, and distributes the reduction across many smaller cuts rather than a few large stubs. The result is a shorter, smaller tree that can close its wounds and remain structurally sound.
Appropriate crown-reduction work is different from indiscriminate topping. The suitable amount and cut locations depend on species, structure, condition, and objectives, so substantial reduction should be specified by an independently qualified professional.
What to Do If Your Tree Was Already Topped
If a tree has been topped, an independently credentialed professional can assess whether staged restorative pruning is appropriate. Outcomes and timelines vary, and some trees may not be good candidates.
If the tree has significant decay in the stub areas, structural assessment (including resistance testing for internal decay) will tell you whether the tree has a viable future or whether removal is the safer long-term choice.
Either way, you'll spend more money managing a topped tree over its remaining life than you would have spent on proper pruning to begin with.
About the Author
Andrew is the owner of Midwest Roots Tree Services in Omaha, Nebraska. The articles provide general homeowner education and are not professional diagnoses or substitutes for an on-site assessment. Schedule a free assessment.