
Arborist-Led Plant Health Care
Plant Health Care in Denver, CO
When a tree starts looking unhealthy, the first question should be why.
Tree Pros provides Plant Health Care throughout the Denver metro with evaluations and recommendations guided by ISA Certified Arborists and Board Certified Master Arborist leadership.
We look at the tree, its symptoms, growing conditions, and likely causes before recommending treatment.
The goal is not to sell a treatment. The goal is to understand what the tree needs.
Start With the Cause
Plant Health Care Looks at the Whole Tree, Not Just the Symptom
Plant Health Care is an approach to maintaining and improving tree and plant health by identifying problems, reducing stress, and recommending care based on the condition of the plant.
- A thinning canopy does not automatically mean a tree needs fertilizer.
- Yellow leaves do not automatically mean disease.
- Dead branches do not always mean the tree should be removed.
- Similar symptoms can have very different causes.
Tree Pros evaluates the tree and relevant site conditions before recommending what should happen next.
Depending on what we find, that may involve monitoring, watering recommendations, pruning, fertilization, insect management, disease treatment, or another approach.
Sometimes the right recommendation is no treatment at all.

What Are You Seeing?
Changes in a Tree Can Be Worth Investigating
You do not need to diagnose the problem before calling us. Tell us what has changed.
Thinning Canopy
A canopy that looks noticeably thinner than it did in previous seasons may indicate stress, decline, insects, disease, root problems, or other growing-condition issues.
Yellow or Discolored Leaves
Leaf color changes can have several possible causes. The pattern, timing, species, and condition of the rest of the tree can help narrow down what is happening.
Dead Branches or Dieback
Branch dieback may result from environmental stress, insects, disease, root problems, previous damage, or other factors. The cause matters before deciding how to respond.
Early Leaf Drop
Leaves dropping earlier than expected can be associated with stress or health problems, but the cause should be evaluated rather than assumed.
Insect Activity
Holes, galleries, insects, unusual material on bark or leaves, and canopy decline may indicate an insect problem that deserves closer evaluation.
Tree Insect ControlDisease Symptoms
Spots, discoloration, abnormal growth, dieback, cankers, and other changes may be associated with tree disease or other stresses.
Tree Disease TreatmentSlow or Weak Growth
A tree that appears to be growing poorly may be responding to soil conditions, water availability, root problems, environmental stress, or other limitations.
A Tree Just Does Not Look Right
Sometimes there is no obvious single symptom. If a tree has changed and you are concerned, an arborist evaluation is a reasonable place to start.
Certified Arborist ServicesDo Not Treat the Guess
The Same Symptom Can Have Different Causes
Tree health problems are not always obvious from one symptom.
A thin canopy could be related to drought stress, root problems, insects, disease, soil conditions, previous damage, or several factors working together. Water is often a factor, so it can help to understand how much water a tree needs in Denver and winter tree watering in Colorado.
Treating the wrong problem wastes time and may do nothing for the tree.
Tree Pros starts by looking at the tree and the conditions around it.
We consider the symptoms, species, overall condition, site, visible stress factors, and relevant history before recommending care.
That diagnosis-first approach helps us decide whether treatment is appropriate and what type of care actually makes sense. When decline is the concern, review the signs a tree may be dead or dying.
Care Based on What We Find
What Plant Health Care May Include
Plant Health Care is not one treatment. The appropriate recommendation depends on the tree, the problem, and the conditions affecting it.
Tree Health Evaluation
We evaluate visible symptoms, overall tree condition, site factors, and other clues to help determine what may be affecting the tree.
Learn MoreTree Disease Treatment
When symptoms are associated with a disease problem, the next step may involve disease-specific management based on the tree and condition.
Learn MoreTree Insect Control
When damaging insects are involved, management should be based on the pest, tree species, condition of the tree, and appropriate treatment timing.
Learn MoreTree Fertilization
Fertilization may be useful when tree condition and growing conditions indicate that additional nutrients or soil-focused care are appropriate. It should not be treated as an automatic solution for every stressed tree.
Learn MorePruning
Dead, damaged, or problematic branches may need selective pruning as part of a larger tree care plan.
Learn MoreMonitoring and Follow-Up
Not every tree problem requires immediate treatment. In some situations, monitoring changes over time may be the most reasonable next step.
Front Range Growing Conditions
Denver Can Be a Difficult Place for Trees to Grow
Trees growing around Denver deal with conditions that are very different from those in many forest environments.
Dry periods, compacted urban soils, limited rooting areas, irrigation patterns, construction impacts, temperature swings, heavy snow, wind, insects, disease, and previous damage can all influence tree health.
Often, more than one stress is involved.
Understanding those conditions is an important part of deciding what a tree needs.
Drought and Water Stress
Periods of limited moisture can stress trees, especially when root systems are restricted or the tree is already dealing with another problem. Water stress can also make it harder for some trees to respond to additional environmental pressures.
Urban Soil Conditions
Residential and urban soils can be compacted, disturbed, or limited by sidewalks, driveways, buildings, and other development. What is happening below ground can affect what eventually becomes visible in the canopy.
Heavy Snow and Wind
Storm damage can remove canopy, break branches, and add stress to a tree that was already struggling.
Insects and Disease
Emerald Ash Borer, IPS beetles, and other insects or diseases can become part of the health picture for Denver-area trees. The presence of an insect or disease does not automatically tell us the correct treatment. Species, condition, severity, timing, and realistic treatment options all matter.
When Insects Are Involved
Not Every Insect on a Tree Is a Reason to Treat It
Trees support many insects, and seeing an insect does not automatically mean the tree has a damaging infestation.
When insect activity is suspected, identification matters. We consider the insect involved, tree species, visible damage, tree condition, timing, and whether treatment is appropriate.
Tree Pros has worked through insect outbreaks affecting Denver-area trees, including Emerald Ash Borer and IPS beetles.
When insect management is warranted, the recommendation should target the actual problem rather than treating the tree simply because insects are present.
When Disease Is Suspected
Symptoms Need Context Before They Become a Diagnosis
Leaf spots, discoloration, dieback, abnormal growth, cankers, and canopy decline can sometimes indicate disease.
They can also overlap with environmental stress, root problems, insects, or other conditions.
That is why Tree Pros evaluates the tree before recommending disease treatment.
When disease management is appropriate, the approach should consider the tree species, condition, disease involved, timing, and realistic expectations for treatment.
Nutrition Is One Part of Tree Health
Fertilizer Is Not a Cure for Every Declining Tree
Fertilization can be useful for some trees, but a struggling tree does not automatically have a nutrient problem.
If the underlying issue is drought, root damage, disease, insects, poor structure, or another stress, fertilizer alone may not address the cause.
Tree Pros considers the condition of the tree and its growing environment before recommending fertilization.
The Recommendation Should Fit the Tree
Tree Care Should Solve a Problem, Not Create a Treatment Schedule
Tree Pros does not begin with the assumption that every tree needs recurring treatments. We begin with the condition of the tree.
- What symptoms are present?
- How long have they been there?
- What species is the tree?
- What are the growing conditions?
- Are insects or disease involved?
- Is the tree dealing with structural damage or environmental stress?
- What treatment options are reasonable?
Sometimes treatment is appropriate.
Sometimes pruning or changes in tree care make more sense.
Sometimes the tree should simply be monitored.
And sometimes a severely compromised tree cannot reasonably be preserved.
The recommendation should come from the problem, not from a preset package.
What to Expect
How Plant Health Care Works With Tree Pros
Tell Us What You Are Seeing
Let us know what has changed, what symptoms you have noticed, and how long the problem has been present.
We Evaluate the Tree
We look at visible symptoms, tree condition, species, site factors, and other relevant clues to understand what may be happening.
We Identify the Likely Problem
The goal is to understand the cause or contributing stresses before deciding whether treatment is appropriate.
You Get a Clear Recommendation
We explain what we find and whether treatment, pruning, fertilization, monitoring, or another approach makes sense.
Recommended Care Is Completed
If you approve the proposed work, Tree Pros carries out the recommended care and explains any relevant next steps.
Experience You Can Verify
Plant Health Care Guided by Certified Arborists
Tree health problems are rarely helped by guessing.
Tree Pros founder Paul Goin began professional tree care in Golden, Colorado, in 1981.
He became an ISA Certified Arborist in 1988 and founded Tree Pros in Denver in 2003.
Paul earned the ISA Board Certified Master Arborist credential in 2015 and graduated from the American Society of Consulting Arborists Academy in 2018.
He also holds ISA Tree Risk Assessment Qualification, ASCA Tree and Plant Appraisal Qualification, and a Colorado Department of Agriculture Qualified Supervisor credential.
Today, Tree Pros has three ISA Certified Arborists on staff, and every crew leader is an ISA Certified Arborist.
That experience helps us look beyond a symptom and consider the tree as a whole.
- Professional tree care experience dating to 1981
- Tree Pros founded in Denver in 2003
- 3 ISA Certified Arborists
- Every crew leader ISA Certified
- Board Certified Master Arborist leadership
- ISA TRAQ
- ASCA Academy Graduate
- ASCA TPAQ
- Colorado Department of Agriculture Qualified Supervisor
Customer Reviews
What Customers Say About Tree Pros
"Paul is knowledgeable and helpful - we had him come out to assess our trees health as well as help with an issue we were having with rust on one of our trees - highly recommend!"
Deirdre Frank
Google Review
"I've got a tree with damage that is dying. I contacted Paul at Tree Pros and he gave me quite a lot of advice that I'm hoping will have an impact in saving the tree. I appreciated his detailed advice (it's great when a person can get this kind of info from an expert) and I have my fingers crossed!"
Ryan Patterson
Google Review
"Tree Pros recently checked my trees and gave me excellent advice on those that were struggling a bit, and which ones that were doing just fine. The young man knew what he was talking about...I will use again in the future. Highly recommended!"
Bart Carpenter
Google Review
"Great. Knowledgeable. Friendly. Looking forward to our project!"
Tamara Brady
Google Review
"Paul and Greg and Tree Pros are excellent at tree trimming. They are certified arborists, which means they will trim your tree in a way to keep it healthy and looking nice. They just don’t hack off limbs without concern for health or looks. Highly recommend them for a healthy tree trimming!"
Dan Pastula
Google Review
Related Tree Care
Tree Health Problems Often Overlap
Certified Arborist Services
Arborist evaluations that identify what is actually affecting your tree.
Learn MoreTree Disease Treatment
Disease-specific management when symptoms point to a disease problem.
Learn MoreTree Insect Control
Targeted insect management based on the pest, tree, and timing.
Learn MoreTree Fertilization
Nutrient and soil-focused care when the tree and conditions call for it.
Learn MoreTree Trimming & Pruning
Selective pruning as part of a larger tree care plan.
Learn MoreTree Removal
Careful removal when a tree cannot reasonably be preserved.
Learn MoreServing the Denver Metro
Plant Health Care Across the Denver Metro
Tree Pros provides arborist-led Plant Health Care throughout Denver and surrounding communities.
Plant Health Care Questions
Frequently Asked Questions About Plant Health Care in Denver

