Should I Treat or Remove My Ash Tree?
The borer question, answered with arithmetic instead of a brochure. Where your tree sits on one measurement — how much canopy is left — is most of the answer.
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One bar answers most of it: how much canopy is left
EAB treatmentCanopy remaining, full to gone
Healthy or newly exposed
Full canopy, no signs
The strongest candidate there is. Treatment ahead of infestation protects essentially all of the tree, and this is the cheapest this decision will ever be.
Early infestation
Thinning up top, under a third gone
Still worth treating on most trees. Injection can stop the loss where it is, and the tree keeps most of what makes it worth having.
The honest gray zone
A third to a half gone
Case by case, and anyone who answers without climbing the tree is guessing. Species of location, target underneath and your own attachment all weigh in.
Past the line
More than half gone
Treatment cannot rebuild what the larvae have already cut off. The conversation is now about removal timing, and sooner is cheaper than later.
Place your tree roughly and the arborist refines it. A photo of the whole crown against the sky is usually enough to start.
The argument for each, from a company that sells both
Get the written answer
The case for treating
A mature ash is worth real money standing
Injection costs a fraction of removal
A treatment cycle runs a small share of what taking the same tree down costs, and it repeats every two years rather than once.
Shade is not replaceable on any useful timeline
A sixty-foot ash cools the house and frames the street. Its replacement gets there in about thirty years.
Treatment genuinely works
Properly timed trunk injection protects an ash through the peak of borer pressure. This is one of the few tree diseases where prevention is close to certain.
The math holds for decades
Many two-year cycles fit inside the removal price of a big tree, and the tree is alive the whole time.
The case for removing
Some ash trees are past the arithmetic
Damage is permanent
The borer cuts the tree's plumbing. A canopy that is half gone stays half gone, treated or not, and a compromised ash sheds limbs.
Dead ash gets dangerous fast
Untreated ash goes brittle within a couple of years of dying, and brittle enough that climbing it stops being safe. Waiting converts a routine removal into a crane job.
Treatment is forever
Stop injecting and the protection stops. A homeowner who is not committed to the cycle is better served deciding now than lapsing later.
Some trees were never the right candidate
A poorly formed ash over a shed, planted too close to the house, in decline for other reasons — the borer is just the deciding vote.
Four things to look for before anybody visits
D-shaped holes, explained
The top of the crown
Borer damage shows here first, because larvae in the upper trunk cut supply to the highest wood. Thin at the top is the early warning.
Woodpecker flecking
Pale patches where bark was chipped off by woodpeckers hunting larvae. On an ash this is diagnostic, and it shows before the holes do.
Epicormic shoots
Bushy sprouts on the trunk and big limbs are the tree rerouting around damage. A stressed tree's signature move.
D-shaped exit holes
The size of a grain of rice, flat on one side. By the time these are visible at eye level the infestation is years old.
Two photos — the whole crown, and anything odd on the bark — usually place a tree on the gauge.
Three ways this goes, drawn to scale
See pricing
Treating on a two-year cycle
A fraction, repeated
Injection every other year, on a tree that keeps doing everything a mature shade tree does. The longer the tree stands, the better this bar looks.
Removing now, on your schedule
$4,000 – $8,000
A planned removal of a large ash, with time to compare bids and pick the season. Expensive, once, and done.
Removing later, on the tree's schedule
The worst of both
A dead, brittle ash that can no longer be climbed costs more to remove than the same tree alive, and it chooses its own timing, usually in a storm.
Removal figures are Eden's published range for larger, older trees and vary with size and access. Treatment pricing is quoted per tree after a look, because trunk diameter drives the dose.
“The removal of a 27-year-old, 60-foot river birch. DJ was very knowledgeable and helped me decide if the tree was worth saving.”
Read these before either estimate
We sell both options
Eden injects ash and removes ash. Whichever you choose, we get the work — which is exactly why you can trust the recommendation to be about the tree.
The gauge above is the framework
Canopy loss is the single best predictor of whether treatment pays. Everything else is adjustment around it.
The gray zone is real
Between a third and a half gone, honest arborists disagree. We will tell you which way we lean on your tree and why, in writing.
Doing nothing is a decision too
It is the one choice with no version where you come out ahead. An untreated ash in this metro is on a countdown, not a coin flip.
The window for deciding is real
Every season an infested tree stands untreated moves it rightward on the gauge. The decision does not get easier with time; it gets made for you.
The recommendation always comes in writing, with the canopy estimate that produced it, so you can get a second opinion against something concrete.
Common questions about the ash decision
Ask us something elseIs my ash definitely going to get the borer?
In this metro, functionally yes. Omaha has already lost more than nine thousand ash trees, and an untreated ash here is a matter of when rather than whether. That is blunt, and it is the consensus of everyone who works on trees in eastern Nebraska.
How much does treatment cost compared to removal?
A trunk injection cycle costs a small fraction of removing the same tree, repeated every two years. Removal of a large ash runs $4,000 to $8,000 at our published range, and a dead one costs more than a live one because of what brittleness does to the working method.
How do I know how much canopy is gone?
Stand where you can see the whole crown against the sky, ideally next to a photo from a few summers ago, and estimate what share of the outline is bare sticks rather than leaf. Rough is enough to place you on the gauge; the arborist refines it from there.
Can a treated ash still get infested?
Properly timed injection protects the tree to a very high degree. Treatment started after heavy infestation is protecting plumbing that is already cut, which is why the same injection is a great buy at full canopy and a poor one at half.
How long do I have to keep treating?
Plan on every two years for as long as you want the tree. Nobody honest will promise a date when stopping becomes safe, so treat the cycle as a subscription the tree is worth or it is not.
My ash looks fine. Why would I spend anything?
Because a full canopy is the best and cheapest treatment candidate there is. By the time an ash looks sick, the infestation is years old and part of the tree is already gone.
What happens if I just wait?
The tree moves rightward on the gauge, the treatment option expires, and the removal gets more expensive as the wood dries. Waiting is choosing removal at the worst price.
Will you tell me which one to do?
Yes, in writing, after looking at the actual tree. An experienced arborist walks it, places it on the gauge, and gives you a recommendation with the reasoning attached. The estimate is free either way — 402-332-2839.
The walk is free and the recommendation comes in writing, whichever way it points.
Two industries have an opinion about your ash. Neither is about your tree.
EAB treatmentThere are two industries with an opinion about your ash tree. One sells injections and would like every ash treated forever; one sells removals and finds a reason most trees should come down. Neither brochure is about your tree.
The arithmetic itself is not complicated. A mature ash is worth treating when enough of it is left to be worth keeping — and canopy is the measure, because the borer kills by cutting supply and the crown is where the cutting shows. Above roughly two-thirds of a canopy, injection is one of the best deals in tree care. Below half, it is money spent commemorating a decision that should have been made earlier. In between is judgment, and judgment should come from somebody standing under the actual tree.
Eden is in the unusual position of selling both answers, which is the only reason a page like this can be honest. Whichever way your tree goes, the work is ours either way, so the recommendation has nothing riding on it but being right. Send a photo of the whole crown or book the walk — 402-332-2839 — and you will get the answer with the reasoning attached, free, in writing.