Tree Care in Fort Collins
Done Right, Every Season
Fort Collins has more urban tree canopy than almost any Front Range city — and more to protect. American Turf & Tree Care has served Northern Colorado homeowners since 1982 with expert tree fertilization, Emerald Ash Borer treatment, pest control, and disease management.
Fort Collins Trees Have a Specific Set of Problems
Fort Collins is home to thousands of mature ash trees — many of them planted along older neighborhood streets and in established parks like City Park, Rolland Moore, and Spring Canyon. That canopy is a real asset, but it also means Emerald Ash Borer pressure here is higher than almost anywhere else in Northern Colorado. EAB has been confirmed in Larimer County, and ash trees that aren't actively protected are at risk.
On top of that, Fort Collins sits on the same alkaline Front Range soil that makes Iron Chlorosis a persistent problem for trees across the area. When soil pH runs too high — which is common here — trees can't absorb iron properly, even when it's present in the ground. The result is yellowing leaves, weakened branches, and trees that look like they're struggling no matter how much you water them.
We've been treating trees in Fort Collins and the surrounding area for over 44 years. We know what the soil does here, which pests are active, and which treatment approaches actually hold up in this climate.
Our Tree Care Services in Fort Collins
Every service starts with an inspection. We don't apply a generic program — we look at your specific trees, understand what's going on, and treat accordingly.
Tree Fertilization
Colorado's alkaline soil blocks nutrient uptake. Our seasonal program corrects pH imbalances and delivers the iron and micronutrients your trees actually need to stay healthy through each season.
Learn more →Emerald Ash Borer Treatment
EAB is confirmed in Larimer County. Our trunk injection program delivers close to 90% protection and holds for two full growing seasons. Proactive treatment is significantly cheaper than removal.
Learn more →Tree Pest Control
Beyond EAB, Fort Collins trees face Lilac Ash Borers, aphids, scale, and spider mites. We identify the actual pest, apply the right treatment at the right time, and use eco-friendly methods throughout.
Learn more →Tree Disease Treatment
Fire blight, cytospora canker, and fungal diseases are all active in the Front Range. Early identification is the difference between treating a problem and losing a tree.
Learn more →Emerald Ash Borer in Fort Collins: What You Need to Know
EAB was first detected in Colorado in 2013 and has since been confirmed in Larimer County. Fort Collins has one of the densest concentrations of ash trees on the Front Range — which makes the exposure here real. These beetles tunnel into ash trees and destroy the vascular tissue that carries water and nutrients, killing trees from the inside out.
A female EAB can spread her eggs up to 2–3 miles from her home tree. By the time visible damage appears, the infestation is often well established. Proactive treatment is the only reliable protection.
Signs your ash tree may already be affected:
- D-shaped exit holes in the bark
- Zig-zag galleries under peeling bark
- Thinning or dying upper branches
- Bark splitting or heavy peeling
- Increased woodpecker activity
- Sprouts growing from the trunk base
Don't wait for symptoms. Once an ash tree shows significant crown dieback, treatment options narrow considerably and removal becomes more likely. Call us for a free EAB inspection: 970-352-7711.
Yellow Leaves in Fort Collins? It's Probably Not a Watering Problem
One of the most common tree problems we see in Fort Collins is Iron Chlorosis — leaves turning yellow despite regular watering. It's not caused by drought. It's caused by alkaline soil that locks up iron and prevents trees from absorbing it, even when iron is present in the ground.
Fort Collins soil consistently runs at a pH that interferes with iron and phosphorus uptake. That same alkalinity also makes trees more vulnerable to disease and pest pressure because a nutrient-stressed tree has less capacity to defend itself.
Fixing it requires addressing the soil chemistry directly — not just watering more. Our approach:
- Inspect your trees and test soil conditions to confirm Iron Chlorosis
- Correct pH imbalances and iron deficiencies at the root zone
- Apply targeted trunk injections to deliver nutrients directly into the vascular system
- Build a seasonal care plan to maintain healthy iron levels going forward
If your trees are showing yellowing leaves, don't wait — nutrient stress compounds over time. Request a free quote and one of our technicians will assess what's happening.
Ready to Protect Your Fort Collins Trees?
Free quotes, no contracts, and a 100% satisfaction guarantee. One call and we handle the rest.
Why Fort Collins Homeowners Work With Us
We're not a national franchise. We're a Northern Colorado company that has been doing this work in this specific climate since 1982.
No Binding Contracts
We earn your business through results. No long-term commitments or fine print.
100% Satisfaction Guarantee
Unhappy with your results? We come back and make it right at no additional cost.
ISA Certified Arborists
Our technicians hold ISA certification and stay current on treatment methods and industry research.
Eco-Friendly Products
Environmentally responsible treatments — effective for your trees, safe for your family and neighborhood.
44+ Years of Local Experience
We know Fort Collins soil, Fort Collins pests, and what actually works here — not just in theory.
Save a Tree, Plant a Tree
Sign up for our winter watering program and we'll donate $15 to the Colorado Tree Coalition.
