Serving Aurora Since 2003
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ISA Certified Arborist
If you live in Greenwood Village, the city is actively treating ash trees on public property and in parks to protect against the Emerald Ash Borer. However, they do not treat trees on private property. If an ash tree sits on your lot, protecting it is entirely your responsibility.
The Emerald Ash Borer is already devastating the local canopy. When you see city trucks injecting trees along the street, it creates a false sense of security.
Many homeowners mistakenly believe their trees are covered. They are not.
Once an untreated ash tree shows visible canopy dieback, it is often too late to save. Removal can cost thousands of dollars per tree, significantly more than preventative treatment.
Our local canopy didn't happen by accident. Before development, this area was mostly high plains prairie.
Every mature ash tree shading your home was planted deliberately by early developers and homeowners.
These trees are now reaching their peak maturity, providing the shade and property value that makes Greenwood Village so desirable.
But ash trees make up a disproportionate percentage of our neighborhood canopy.
If we lose them, the character of the neighborhood fundamentally changes.
Replacing a 40-year-old tree is impossible in our lifetime. A sapling won't provide the same cooling effect or curb appeal.
The math is simple: saving your existing mature trees is the most cost-effective decision you can make for your property.
★★★★★
"Ironwood Earthcare came out and evaluated our property. We had three mature ash trees we assumed the city was handling. They weren't. The treatment was quick, professional, and saved our canopy."
— Sarah T., Greenwood Village Resident
No obligation, free canopy assessment. Licensed and insured.
Most tree companies ask what species you have. In Greenwood Village the more useful question is what decade your street was planted in, because that decides what went in the ground and what it is doing now. Find your wave below.
| Planting wave | Where you see it | What is happening now | First move |
|---|---|---|---|
| Orchard and ranch remnants, pre-1950 | Greenwood Hills, West End, The Orchard, Orchard Hills | Survivor orchard stock and old shade trees carrying decades of unpruned weight, with deadwood high in the crown | Crown cleaning and structural assessment before the next wet snow |
| Homestead plantings, 1960s | Scattered through the older west-side acreage and along original drives | Russian olive, blue spruce and pine put in by a 4-H club are now sixty years old and at the end of their useful structure | Removal decisions on the failing ones, before they fail on their own schedule |
| The subdivision wave, 1967-1995 | Sundance Hills, Huntington Acres, Dayton Farms, Greenwood Acres | Street after street planted the same year with the same few species, hitting the same structural pruning backlog at once | Structural pruning to ANSI A300, and an ash inventory of your own lot |
| The municipal and estate wave, 1990s | The Preserve, and the 1,000 to 2,000 trees a year the Village was planting | Thirty-year-old landscape trees entering the years when codominant stems split | Reduce and subordinate competing leaders now, while the cuts are still small |
| Custom estate & Tech Center, 2000s onward | Bateleur, One Cherry Lane, the Denver Tech Center corridor | Young, heavily irrigated, expensively installed, and almost never structurally pruned | Early training cuts, plus soil and root-zone care so the investment survives |
A codominant stem is two trunks of similar size competing at one union, usually with bark trapped between them. It is the single most common way a healthy-looking Greenwood Village shade tree comes apart. The wood is fine. The attachment is not.
The 1960s wave is its own category. Russian olive, blue spruce and pine went in through that decade, and those trees are now sixty years old. Short-lived species at the end of their structural life do not decline gracefully — they come apart.
Greenwood Hills and the West End sit on the oldest ground, with canopy left from the apple orchards. Big old trees on big old lots are not a maintenance problem until the day they are a structural one. That day shows up as deadwood.
Sundance Hills and Huntington Acres are the middle wave, planted on a subdivision schedule between 1967 and 1995. A street planted in one season needs the same work in one season. One neighbor calling us usually means four should.
Sundance Hills runs an HOA with a clubhouse, pool and tennis courts. An HOA maintains the common areas — the trees inside your property line are still yours. We write scopes that survive a board review when covenants apply.
The Preserve backs the High Line Canal and the 55-acre Marjorie Perry Nature Preserve. Trees at a property edge still belong to somebody, and so does the limb that lands across the line. We identify the line before we quote.
The Village's own emerald ash borer page reports EAB confirmed in a small area of Arapahoe County, within the City of Littleton, on June 29, 2023. The Colorado State Forest Service now counts the beetle in more than 20 Front Range cities.
The Village responded by treating 388 City-maintained ash — every one at least 10 inches in diameter and in good condition — out of an estimated 1,100. A city does not spend that on a threat it considers theoretical. Yours were not included.
Here is the honest math. Untreated infested ash dies within three to five years, an emamectin benzoate injection gives roughly two years of protection, and ash less than 40 percent declined respond extremely well. Past that threshold, the conversation becomes removal.
Injections are not only an ash tool. The same trunk-injection program treats iron chlorosis with results in four to six weeks, plus scale, systemic pests, anthracnose and micronutrient deficiency. That yellow, veiny foliage is usually chlorosis, not a watering problem.
Watch for a thinning canopy, D-shaped exit holes in the bark, and S-shaped tunnels underneath it — the same signs the Village tells residents to look for. And do not move firewood, which is how this beetle covers ground it cannot fly.
★★★★★
"I've had three different tree companies out over the years. Ironwood is in a completely different league. They actually diagnosed why my ash tree was declining instead of just guessing. Treated it and it's thriving again. That's expertise you can't fake."
— Robert T., Denver, CO
An ISA Certified Arborist tells you treat or remove, in writing, before you spend anything.
On May 5 and 6, 2026, wet spring snow snapped branches across the Denver metro and Xcel reported outages affecting more than 43,000 customers. Wet snow does not find weak trees at random — it finds deadwood, included bark, and unreduced end weight.
Dead ash goes brittle fast, and brittle wood over a roofline is a different job than live wood. The removal you defer is not the same removal next year — it is harder, slower, and more dangerous to rig.
Then there is the property line. A limb that fails onto a neighbor's roof becomes a conversation about who knew what, and when. Documented arborist assessment is a better position than a photograph taken afterward.
Timing matters more than most homeowners expect. A treatment window closes when canopy loss passes the point where a tree can still move product through its own vascular system. After that you are paying for a removal you could have avoided.
For old wood carrying decades of weight — Tree Removal at /tree-removal when structure is gone, and Stump Grinding at /stump-grinding so the removal is actually finished and the ground is plantable again.
For the ground layer everything else depends on — Lawn Fertilization and Weed Control at /lawn-fertilization-weed-control, because turf chemistry and root-zone health are the same conversation as tree health on an irrigated Front Range lot.
Derek Stroden is an ISA Certified Arborist with a B.S. in Forestry from Colorado State University and a Colorado Department of Agriculture Certified Spray Supervisor credential. Certification is the difference between a diagnosis and a guess.
Ironwood has worked Arapahoe County since 2003, serving 25,000 residential and 1,000 commercial clients at 4.7 stars from nearly 200 Google reviews. We are family-owned and independent — not a franchise, not private-equity backed.
We carry general liability and workers' compensation insurance, and we prune to ANSI A300 standards. We never top trees, because topping trades structure for tidiness and creates the weak attachments that fail later.
One more thing people ask before they call. We do not quote tree work sight unseen, which is exactly why the assessment is free — a real number requires somebody standing under the tree.
Know Before We Cut — You get the diagnosis and the plan before a saw comes off the truck.
Know Before You Pay — A written quote, in your hand, before any work begins.
No Unauthorized Extras — Nothing gets added to the job or the invoice without your say-so.
Your Property Comes First — Lawn, beds, fence, driveway. We work around what you built.
Cleanup Is Part of the Job — Not an upsell. Not a separate line. Part of the job.
Free assessment. Written quote before anyone starts. No obligation, and no charge if you decide not to proceed.
That is your whole job. Tell us the address and roughly what is worrying you.
We look at structure, not just leaves - attachments, deadwood, root zone, and every ash on the lot.
Plain language, in writing, with what is urgent separated from what can wait a season.
Nothing happens until you approve the scope and the number. Cleanup is included.
The City of Greenwood Village reports that emerald ash borer was identified and confirmed in a small area of Arapahoe County, within the City of Littleton, on June 29, 2023. The Colorado State Forest Service now reports the beetle in more than 20 Front Range cities, and the first Douglas County detection was confirmed in Parker in July 2026. Greenwood Village maintains an estimated 1,100 ash trees on City property and treated 388 of them in 2023. If you have ash on your property, the responsible assumption is that pressure is nearby and the decision is yours to make now rather than later.
No. The Village's emerald ash borer program covers ash on City-maintained property, which is where the 388 trees treated in 2023 came from. The City's own guidance asks residents to identify the ash on their own property, decide whether the tree's health merits treatment or removal, and contact a certified arborist for help with that decision. Trees on your side of the property line are your responsibility, and that is exactly what a free on-site assessment is for.
Requirements differ depending on whether the tree sits on private property, in a public right-of-way, or inside an HOA-controlled community, and municipal rules change over time. We confirm the current requirement with the Village before any removal, and we check covenants where an HOA applies, such as in Sundance Hills. You should never be the one chasing that answer down, and you should never learn about a requirement after the tree is already on the ground.
Greenwood Village's median home build year is 1983, and neighborhoods like Sundance Hills went up between 1967 and 1995, which means whole streets were planted in the same few seasons with the same few species. Those trees are now reaching the age where competing leaders and codominant stems start to fail, usually under wet spring snow rather than wind. The work at this stage is structural pruning to ANSI A300 standards, and it is far cheaper and far less invasive than the removal that follows if it is skipped.
That depends on how far the tree has declined. Ash less than 40 percent declined respond extremely well to treatment, an emamectin benzoate trunk injection provides roughly two years of protection per treatment, and untreated infested ash dies within three to five years. An ISA Certified Arborist assesses the actual decline percentage on site and tells you which side of that line your tree is on, in writing, before you spend anything.
An ISA Certified Arborist comes to your property, walks the lot, and evaluates tree structure, deadwood, attachment points, root zone conditions and every ash on the property. You receive the findings in plain language and a written quote that separates what is urgent from what can wait, with no obligation to proceed. Nothing is cut and nothing is charged until you approve both the scope and the number.
No. Topping removes a tree's structure in exchange for a season of tidiness and forces weak, fast regrowth at the cut points, which is what fails in the next heavy snow. All of our pruning follows ANSI A300 standards, which is the national standard for tree care operations. If another company offers to top your tree, that tells you what you need to know about that company.
Yes. Ironwood has served more than 1,000 commercial clients alongside 25,000 residential ones since 2003, including HOA-governed neighborhoods and office-park landscapes of the kind that fill the Denver Tech Center corridor. We provide written scopes suitable for board review and covenant compliance, and we coordinate access and scheduling around tenants and residents. Call (303) 366-3020 to discuss a property-wide assessment.
The offer is specific. A free on-site assessment by an ISA Certified Arborist, plus a written quote, with no obligation. If the answer is that your trees are fine and need nothing this year, that is the answer you will get.
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Serving Greenwood Village and Arapahoe County since 2003. 4.7 stars from nearly 200 Google reviews.
ISA Certified Arborist on every assessment.
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