Certified Arborists in Denver
Certified Arborist Services in Denver, CO
Not sure what is going on with your tree? That is exactly what the first visit is for.
Tree Pros helps Denver-area property owners understand tree health, structure, damage, risk, insects, disease, pruning needs, and whether removal is actually necessary. Our team includes three ISA Certified Arborists, every crew leader is an ISA Certified Arborist, and Tree Pros is led by founder and ISA Board Certified Master Arborist Paul Goin.
We evaluate the tree first, explain what we find in plain language, and recommend what makes sense for the tree and the property.
- Professional Tree Care Since 1981
- Tree Pros Founded in Denver in 2003
- 3 ISA Certified Arborists
- Every Crew Leader ISA Certified
- Board Certified Master Arborist Led
Start With the Tree
When Should You Call a Certified Arborist?
You do not need to know what service your tree needs before contacting Tree Pros. In many cases, the reason to call an arborist is that you do not know what is wrong.
Your Tree Looks Unhealthy
Leaf discoloration, thinning foliage, dead branches, premature leaf drop, unusual growth, or general decline can have many possible causes.
Plant Health CareYou Are Worried About Structure
Cracks, weak branch attachments, decay, broken limbs, trunk defects, root problems, or a sudden lean may deserve closer evaluation.
A Storm Damaged the Tree
Heavy snow and wind can change tree structure quickly. An arborist can evaluate what failed, what remains, and whether the tree can reasonably be preserved.
Emergency Tree ServiceYou Think the Tree May Need Removal
A concerning tree does not automatically need to come down. An arborist evaluation can help determine whether pruning, treatment, monitoring, removal, or another approach makes sense.
Tree RemovalYou See Insects or Disease Symptoms
Holes, galleries, unusual insects, discolored leaves, dieback, abnormal growth, and other symptoms may point to an insect or disease problem.
You Are Not Sure What the Tree Needs
You do not have to diagnose the problem yourself. Tell us what you are seeing and we will start there.
What an Arborist Looks At
An Arborist Looks at the Whole Tree Before Recommending the Work
Good tree care starts with understanding the tree.
That means looking beyond a single broken branch, discolored leaf, or visible insect.
Depending on the concern, Tree Pros may consider:
- tree species
- overall health and vigor
- canopy condition
- branch structure
- trunk condition
- root and root flare conditions that are visible and relevant
- previous pruning or damage
- signs of insects or disease
- storm damage
- soil and site conditions
- proximity to homes and other property
- reasonable treatment or preservation options
The goal is to understand what is happening before recommending a service. To see the full scope of this work, read about what a Certified Arborist does.
A tree may need pruning.
It may need treatment.
It may need monitoring.
It may need removal.
Or it may not need significant work at all.
Understanding the Credential
What Is an ISA Certified Arborist?
ISA Certified Arborist is a professional credential administered by the International Society of Arboriculture.
For a homeowner, the important point is simple:
Tree care decisions should be based on knowledge of tree biology, structure, health, pruning, diagnosis, and recognized arboricultural practices, not simply on the ability to cut branches.
Tree Pros has three ISA Certified Arborists on staff.
Every Tree Pros crew leader is an ISA Certified Arborist.
Founder Paul Goin first became an ISA Certified Arborist in 1988.
Paul later earned the ISA Board Certified Master Arborist credential.
BCMA Leadership
Tree Pros Is Led by an ISA Board Certified Master Arborist
Paul Goin began his professional tree care career in Golden, Colorado, in 1981 as a ground laborer.
Over the decades that followed, he worked in virtually every position in professional tree care, including ground laborer, production climber, supervisor, and district manager for large tree care companies.
His work also took him beyond Colorado, including professional tree care experience in the Netherlands, Suriname, Honduras, Washington, D.C., and the Denver metro area.
Paul became an ISA Certified Arborist in 1988.
After returning to Denver, he founded Tree Pros in 2003.
In January 2015, Paul earned the ISA Board Certified Master Arborist credential.
In 2018, he graduated from the American Society of Consulting Arborists Academy.
Today, that experience guides a small, family-owned Denver tree care company focused on practical recommendations, professional tree care, and long-term customer relationships.
Paul begins professional tree care in Golden, Colorado.
Paul becomes an ISA Certified Arborist.
Paul starts Tree Pros in Denver.
Paul earns the ISA Board Certified Master Arborist credential.
Paul graduates from the American Society of Consulting Arborists Academy.
Experience You Can Verify
Professional Credentials Behind the Recommendations
ISA Board Certified Master Arborist
Paul Goin earned the ISA Board Certified Master Arborist credential in 2015.
ISA Certified Arborist
Tree Pros has three ISA Certified Arborists on staff, and every crew leader is an ISA Certified Arborist.
ISA Tree Risk Assessment Qualified
Paul holds the ISA Tree Risk Assessment Qualification, commonly known as TRAQ.
ASCA Academy Graduate
Paul graduated from the American Society of Consulting Arborists Academy in 2018.
Tree and Plant Appraisal Qualification
Paul holds Tree and Plant Appraisal Qualification through the American Society of Consulting Arborists.
Colorado Qualified Supervisor
Paul holds a Qualified Supervisor credential with the Colorado Department of Agriculture.
What to Expect
What Happens During the First Tree Evaluation?
The first visit is about understanding the problem. Tell us what you have noticed and what concerns you.
We evaluate the tree and relevant site conditions, explain what we see, and discuss reasonable next steps.
Tree Pros offers a free initial assessment, estimate, diagnosis, and guidance.
Our recommendations are based on the current condition of the tree and recognized arboricultural practices, including applicable ISA Best Management Practices.
If work is recommended, we explain the reason for it and provide clear pricing.
If the tree does not need the service you originally expected, we will tell you that too.
A Straightforward Process
Start With the Problem, Not a Service
Tell Us What You Are Seeing
You do not need to diagnose the tree. Tell us about the symptoms, damage, changes, or concerns you have noticed.
We Evaluate the Tree
We consider the tree's health, structure, species, site conditions, surrounding property, and the specific concern that brought you to us.
We Explain What We Find
You get a practical explanation of what we see and what it may mean for the tree.
We Recommend the Next Step
That may be pruning, Plant Health Care, disease or insect management, fertilization, monitoring, removal, or no immediate work.
You Get a Clear Estimate
When tree care is recommended, we provide straightforward pricing for the proposed work.
The Recommendation Should Fit the Tree
A Recommendation Should Fit the Tree, Not the Service List
Tree Pros does not begin an evaluation assuming the answer will be removal, aggressive pruning, fertilization, or treatment.
We start with the tree.
- What condition is it in?
- What is happening structurally?
- Is there an insect or disease problem?
- What are the site conditions?
- What surrounds the tree?
- Are there reasonable alternatives?
Sometimes the right recommendation is pruning.
Sometimes treatment or monitoring makes sense.
Sometimes removal is necessary.
And sometimes the right answer is to leave the tree alone.
That is the difference between diagnosing a tree problem and simply selling a tree service. If you are weighing options, it may help to read about how to tell if a tree is dead or dying or what to do after storm damage to a tree.
When the Problem Is Health
An Unhealthy Tree Does Not Always Need to Be Removed
Tree decline can have many causes.
Water stress, soil conditions, insects, disease, root problems, previous damage, environmental stress, and other factors can produce symptoms that look similar from the ground.
That is why diagnosis matters.
Depending on what we find, the next step may involve Plant Health Care, disease treatment, insect management, fertilization, pruning, monitoring, or another recommendation.
When the Concern Is Structural
A Tree Can Look Healthy and Still Have a Structural Concern
Green leaves do not tell the whole story.
Signs that may deserve evaluation even when the canopy still looks healthy:
ISA Tree Risk Assessment Qualified
Paul Goin holds ISA Tree Risk Assessment Qualification, and Tree Pros can evaluate tree-related concerns to help determine an appropriate next step.
Depending on what we find, that may involve pruning, monitoring, additional evaluation, or removal.
Local Experience
More Than Four Decades of Tree Care Experience Started Here in Colorado
Paul Goin began professional tree care in Golden in 1981, and Tree Pros has served the Denver metro since 2003.
That history matters because Front Range trees deal with conditions that are easy to underestimate.
Heavy spring snow can break limbs after trees have leafed out.
Strong winds can expose structural weaknesses.
Dry periods and urban soils can stress mature trees.
Emerald Ash Borer, IPS beetles, and other insect or disease problems can change how a tree should be managed.
Tree Pros has worked through major snow damage events, insect and disease outbreaks, and the 2023 Highlands Ranch tornado.
Local experience does not mean assuming every tree has the same problem. It means understanding the conditions Denver trees live with and evaluating the individual tree in front of us.
Customer Reviews
What Customers Say About Tree Pros
"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
"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
"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
"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
What May Come Next
Tree Care Based on What the Evaluation Finds
Tree Trimming & Pruning
Selective pruning to improve structure, clearance, and long-term tree health.
Learn MoreTree Removal
Careful removal when a tree cannot reasonably be preserved.
Learn MorePlant Health Care
Proactive management to keep trees healthier over time.
Learn MoreTree Disease Treatment
Correct identification before treatment of disease symptoms.
Learn MoreTree Insect Control
Targeted management when insect pressure affects tree health.
Learn MoreTree Fertilization
Nutrient support when Denver soils do not provide what a tree needs.
Learn More24/7 Emergency Tree Service
Help with fallen trees, broken limbs, and urgent tree hazards.
Learn MoreServing the Denver Metro
Certified Arborist Services Across the Denver Metro
Tree Pros provides arborist-led tree care throughout Denver and surrounding communities.
Arborist Questions
Frequently Asked Questions About Certified Arborists in Denver