Tree Care in Johnstown
Tree Care for Johnstown's Established and Growing Neighborhoods
Johnstown sits at the county line between Weld and Larimer — a growing community with a mix of newer subdivisions and older established streets, all dealing with the same Northern Colorado tree care challenges. American Turf & Tree Care has served this area since 1982.
Johnstown's Location Puts Its Trees at Higher Risk
Sitting between Weld and Larimer Counties puts Johnstown in a zone where Emerald Ash Borer pressure is real from both directions. EAB has been confirmed in both counties, and the pest spreads quickly — a female beetle can move 2–3 miles from her home tree. Any unprotected ash in Johnstown is a candidate for infestation.
The soil here runs alkaline, same as most of the Front Range. That translates to Iron Chlorosis risk for a wide range of trees — not just ash. Maples, oaks, and ornamental trees all struggle to absorb iron when soil pH climbs too high, and in Johnstown it regularly does.
We've been treating trees in Johnstown and the surrounding area for over 44 years. We know both counties and we know what works here.
Our Tree Care Services in Johnstown
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, Johnstown 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 Johnstown: What You Need to Know
EAB was first detected in Colorado in 2013 and has since been confirmed in Weld and Larimer Counties. Johnstown sits in an active exposure zone — ash trees here are at real risk, and the pest spreads faster than most homeowners expect. 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 Johnstown? It's Probably Not a Watering Problem
One of the most common tree problems we see in Johnstown 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.
Johnstown sits on the same alkaline Northern Colorado soil 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 Johnstown Trees?
Free quotes, no contracts, and a 100% satisfaction guarantee. One call and we handle the rest.
Why Johnstown 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 Johnstown soil conditions, local pest pressure, 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.
