Emerald ash borer protection
The reason most people call. One emamectin benzoate treatment protects an ash for roughly two years. It is preventative — you see no dramatic change, because the change is that the tree does not die.
Trunk Injection · EAB, Iron Chlorosis & Scale
Put the treatment inside the tree, not across your yard
Trunk injection delivers product directly into the tree’s vascular system, where it moves to the canopy on its own. Nothing drifts onto your beds, your pets or the neighbour’s property, and nothing washes off in the next rain.
Applied under a Colorado Dept. of Agriculture licence. Diagnosed before it is quoted.
Free on-site assessment · Written quote · No obligation
- ISA Certified Arborist
- Aurora-Based Since 2003
- 4.8★ from 191 Google Reviews
- Licensed & Fully Insured
What injection actually solves
It is not a cure-all. These are the four things it does genuinely well.
Iron chlorosis in alkaline soil
Yellow leaves with green veins, year after year, on maples, oaks and lindens. Injection puts iron where the roots cannot get it from our soil. Results usually show in the canopy within about four to six weeks.
Scale and systemic sucking insects
Insects feeding inside the tissue do not care what you spray on the outside. Systemic product moving through the tree reaches them where contact sprays cannot.
Fungal disease and micronutrient deficiency
Anthracnose and several nutrient problems respond to systemic treatment far better than to anything applied to the surface of the tree.
How an injection visit runs
A short visit, but the diagnosis and the timing around it are what make it work.
1
The tree is diagnosed and measured
Trunk diameter sets the dose — this is regulated, not estimated. The arborist also confirms the tree is healthy enough for the treatment to be worth doing.
2
Timing is checked against the season
Injection depends on the tree actively moving water. Done in the wrong part of the year it simply does not distribute, and that is money gone. Some products also have a fixed window.
3
Small ports are set at the root flare
Low on the trunk, below the first branches. They are small, they seal over, and they are far less damaging to the tree than the repeated spraying they replace.
4
The tree distributes it on its own
Nothing to hose off, nothing to keep children or pets away from, and nothing on your beds. You get told what to expect and roughly when.
Five promises, in writing, on every job
Nearly every complaint people have about tree companies comes down to the same thing: something happened that the homeowner never agreed to. These five exist so that cannot happen here.
- Know Before We CutA certified arborist walks your property and explains what is wrong before a saw comes off the truck.
- Know Before You PayYou get a written quote. The number you approve is the number you pay.
- No Unauthorized ExtrasNothing gets cut, treated or hauled that is not on the quote you approved.
- Your Property Comes FirstRigging and drop zones planned around your roof, fence and beds — not around our schedule.
- Cleanup Is Part of the JobChips hauled, limbs gone, lawn raked. It is not a line item and it is not extra.
What injections cost
Priced by trunk diameter, because that is how dosing works. Compared against removal and replacement, protecting a mature ash is almost always the cheaper number — you cannot buy a forty-year canopy back.
What drives the price up
Trunk diameter, first and foremost. Multiple trees. Products with a shorter protection interval that need repeating more often. Trees already in decline that need supporting work alongside the injection.
What brings it down
Treating several trees on the same visit — the setup is most of the job. Starting while the tree is still healthy. Staying on a two-year interval rather than letting protection lapse and starting over.
What is always free
The diagnosis, the measurement, and the written quote. And an honest answer on whether your tree is worth treating, which for a badly declined ash is often no.
Why we inject instead of spray, when we can
Spraying a sixty-foot tree means putting a fine mist into the air above your property and hoping most of it lands on the tree. Injection does not have that problem, because the tree does the distribution.
- No drift onto beds, vegetable gardens, pets, or the neighbour’s property
- Nothing to wash off in the next rain or the next irrigation cycle
- Reaches insects feeding inside the tissue, which contact sprays never touch
- About two years of protection per emerald ash borer treatment
- Applied under a Colorado Dept. of Agriculture licence by a Certified Spray Supervisor
What people say about this work
★★★★★
“UPDATE almost a year later and my silver maple is thriving. Those iron injections really worked!”
— Wendy B. · Verified Google Review
★★★★★
“Derek… refused to try to upsell me on treatments I didn’t need but had been quoted as necessary by two other companies… This made me feel very confident in his expertise and honesty.”
— Michael H. · Verified Google Review
★★★★★
“I learned more about tree care talking to him for 5 minutes than I had my entire life. A proposal was in my inbox in minutes and after I accepted a few days later he had a crew out.”
— Michael D. · Verified Google Review
Injection questions people ask first
How long does an emerald ash borer treatment last?
About two years per treatment with emamectin benzoate, then it needs repeating. It is protection rather than a cure, so it has to stay current for as long as you want to keep the tree. Letting it lapse for several years and restarting is more expensive than staying on the interval, because the tree may pick up damage in the gap.
Does injecting a tree hurt it?
The ports are small, they seal over, and the damage is far less than the alternative of repeated spraying. Every injection is technically a wound, which is why dose and placement are regulated and why we do not inject trees that do not need it. On a healthy tree the trade is straightforward: small sealed ports versus losing the tree.
Is it safe around children, pets and vegetable gardens?
That is the main practical reason to inject rather than spray — the product goes inside the tree, so there is no drift and nothing on surfaces. There is no spray cloud, nothing settles on your beds or play equipment, and nothing washes off in the next rain. Every application is made under a Colorado Department of Agriculture licence and we will talk you through the specific product before we do it.
Is it too late for my ash tree?
If the canopy is still mostly full, almost certainly not. If it is well past a third gone, usually yes. The honest answer requires looking at the tree. A declined ash can be propped up for a while, but it is money spent delaying a removal rather than saving a tree, and we would rather tell you that than take the work.
The other five
One certified arborist behind all of them, and one written quote if you need more than one.
Tree Removal · Tree Trimming & Pruning · Stump Grinding · Pest & Disease Control · Lawn Fertilization & Weed Control
An ash tree is worth protecting before it needs rescuing
Protection costs a fraction of removal plus replacement, and a replacement tree is twenty years behind the one you already have. The assessment is free and it settles the question either way.
312 Norfolk St, Unit A, Aurora, CO 80011 · Monday to Friday, 8:00 AM to 5:00 PM · Serving the Denver metro since 2003