Sean Harman's Tree Care

08/05/2026

🚨 BIG NEWS FROM SEAN HARMAN’S TREE CARE 🚨

Due to increased demand for large hazardous tree removals, we are excited to announce the addition of a SECOND CREW and expanded crane-assisted tree removal availability in:

📍 Warrenton, Virginia
📍 Culpeper North, Virginia

We will continue proudly serving our core Alexandria / Fort Hunt service area while now offering additional crane scheduling availability in these new locations.

Our crane-assisted removals help safely and efficiently remove:
✔ Hazardous trees
✔ Storm-damaged trees
✔ Large dead oaks & maples
✔ Tight-access backyard removals
✔ Trees over homes, driveways & structures

Why crane-assisted removals?
✅ Increased safety
✅ Reduced lawn impact
✅ Faster project completion
✅ Precision removals in tight spaces

Whether you are in Alexandria, Fort Hunt, Warrenton, or Culpeper North, our goal remains the same:
Professional arboriculture, safe operations, and high-quality work.

📞 703-565-2676
🌐 [www.seanharmanstreecare.com](http://www.seanharmanstreecare.com)

Brought to you by the Fort Hunt Observatory
🌳 [www.forthuntobservatory.org](http://www.forthuntobservatory.org)

07/05/2026

Hazardous oak removal in Mount Vernon, Virginia. Advanced rigging, controlled dismantling, and safe removal of compromised trees in tight residential spaces by an ISA Certified Arborist. 🌳🪵⚠️

29/04/2026

🌳 Trees Are Not What Most People Think

I was listening to Alex Shigo (the father of modern arboriculture), and it’s a reminder that most people—even in the industry—still misunderstand trees.

Trees are not static objects.
They are generating systems.

Just like the human body replaces cells through Apoptosis, trees are constantly:
– Growing new tissue
– Isolating damaged tissue
– Setting internal boundaries

But here’s the key difference:

👉 Trees don’t “heal” like we do
👉 Trees compartmentalize

That concept is called CODIT

When a tree is wounded or begins to decay, it doesn’t fix the problem—it builds walls around it.

Why this matters:

A tree can have decay and still be structurally sound
A tree can look healthy and be structurally compromised

It all comes down to:
👉 How well it is containing the problem internally

Shigo also challenged something most people never think about:

For years, researchers only cultured decay fungi because they used selective lab media.

When broader methods were used, it revealed:
– Bacteria
– Competing organisms
– Entire ecosystems inside the tree

Not contamination…
👉 A living system at work

Big takeaway:

You can plant a tree.
You cannot plant a forest.

Because a forest is a system, not just a collection of trees.

Most of what I do out in the field isn’t just “tree work.”

It’s:
– Reading structure
– Understanding internal response
– Interpreting how a tree is reacting to stress over time

That’s the difference between cutting trees…

…and understanding them.
https://youtu.be/o6U-6uTAm-o?si=KsqqsGifbKR99noV

399 likes, 25 comments. "CODIT & MICROS by Dr. Alex Shigo"

29/04/2026

This footage was recorded on April 18th at the Mid-Atlantic ISA Tree Climbing Championship (MAC ISA) at Montpelier, VA.
This is the throwline event, where climbers use a weighted line to precisely place a rope into a designated tie-in point high in the canopy—before ever leaving the ground.
That tie-in point becomes the foundation of the entire climb, allowing safe access, movement, and positioning throughout the tree.
Events like this highlight the level of accuracy and control required in professional arboriculture—because every safe climb starts with a precise tie-in point.

28/04/2026

🌳 Fort Hunt Tree Observatory — Field Work Begins

Some trees look perfectly healthy.

They’re not.

Over the next few weeks, I’ll be spending time in Fort Hunt Park documenting real trees, real defects, and how structural issues actually develop over time as part of the Fort Hunt Tree Observatory Project.

This is field-based observation—not theory:

– Species and site conditions
– DBH and structure
– Included bark, decay, and root-related defects
– Failure patterns most people never notice
– How trees respond over time

A lot of what I see during estimates isn’t obvious at first glance.
That’s what this project is meant to show.

This is something I’m doing on my own time for professional development and to better understand the trees we’re working around every day here in Fort Hunt.

📍 Fort Hunt, Virginia
🎥 I’ll be posting field videos and breakdowns soon

🌳 Fort Hunt Tree Observatory — What You’re Not Seeing in Trees Some trees look perfectly fine. They’re not. Over the next few weeks, I’ll be back in Fort Hun...

27/04/2026

Most tree estimates sound the same.

“Yeah… we can cut that down.”
“Yeah… we can trim that.”

But here’s the difference most people don’t see 👇

When I show up, I’m not just giving a price.

I’m documenting how the tree is actually structured, what’s happening inside it, and how it’s likely to behave over time—based on real patterns I’ve seen locally.

That comes from:
– Field research through the Fort Hunt Tree Observatory
https://forthunttreeobservatory.org/
– Studying real failures (not guessing)
– Working on high-risk removals and structural support systems
– Following ANSI standards—not just sales recommendations

Sometimes the right answer is removal.
Sometimes it’s pruning.
Sometimes it’s preserving a tree others would cut down.

But it’s always based on **why**, not just **what**.

That’s the difference between an estimate… and an actual assessment.

27/04/2026

Most tree defects aren’t visible from the outside.

This video shows sonic tomography testing on a mature tree in Fort Hunt, Alexandria VA, used to detect internal decay and structural weakness before failure occurs.

In Fort Hunt, we commonly encounter structural issues such as:
– Co-dominant stems with included bark
– Internal decay that is not externally visible
– Reduced load-bearing capacity under wind stress

Advanced diagnostic tools like this allow for more accurate tree risk assessments. In some cases, trees can be preserved with proper mitigation. In others, removal is the safer and more responsible recommendation.

This work was documented as part of ongoing field observations in Fort Hunt.

Google “Fort Hunt Tree Guy” to see more real tree risk case studies.

Sonic Tree Testing in Fort Hunt VA | Hidden Decay Detection by ISA Certified Arborist Sean Harman

26/04/2026

🍁 What a Declining Maple Tree Can Teach Us (Fort Hunt Park)

While spending time documenting trees in Fort Hunt Park, I came across a mature maple showing a classic pattern of gradual canopy decline.

At first glance, it’s easy to miss. But when you slow down and really look, the signs are there:

🔍 What stood out:
– Upper crown dieback (top of the tree thinning out)
– Reduced leaf density compared to surrounding trees
– Uneven canopy structure
– Overall loss of vigor over time

🌳 What’s actually happening?
Trees like this are often dealing with long-term stress, not a single event. That can include soil compaction, root disturbance, drought cycles, or just age-related decline.

One interesting pattern:
The tree starts to prioritize survival in the lower canopy, while the upper portions begin to decline first. It’s a slow shift—not something that happens overnight.

🧠 Why this matters (from an arborist’s perspective):
Decline usually starts subtly—small twig dieback, fewer leaves, less extension growth. By the time it’s obvious from a distance, the process has often been underway for years.

Observations like this are a reminder that trees are constantly responding to their environment—even when nothing dramatic is happening.

26/04/2026

Fallen Tree in Fort Hunt Park – What Really Caused It

I documented a large Quercus rubra that recently failed in Fort Hunt Park near one of the picnic areas—and the cause might surprise you.

Most people would look at the split higher up in the tree and assume that’s why it failed.

But the actual failure started at the base.

Decay in the buttress roots weakened the tree where it matters most. The split at the co-dominant stems (bark inclusion) happened after the tree hit the ground, not before.

👉 In other words: what you see isn’t always what caused the failure.

I put together a full case study with photos showing the entire failure sequence:
👉 https://forthunttreeobservatory.org/tree-risk-case-sudies/f/case-study-%E2%80%93fallen-northern-red-oak-with-co-dominant-stem-failure

If you’ve got large trees near your home—especially around Fort Hunt—it’s worth knowing what to look for before something like this happens.

23/04/2026

Would you trust a non-doctor with surgery?

Then why trust your trees to someone who isn’t a certified arborist?

I see it all the time here in Fort Hunt and Alexandria—trees that were “worked on” but left with improper cuts, hidden decay, or weak structure. It might look fine at first… until it doesn’t.

Trees don’t fail randomly. There’s always a reason:
– Included bark
– Internal decay
– Overextended limbs
– Poor past pruning
– Drought stress (which we’re absolutely seeing right now)

The difference is knowing how to identify those risks before failure happens.

That’s what a professional Tree Risk Assessment does.

As an ISA Certified Arborist (MA-6197A), I’m not just looking at your tree—I’m evaluating the risk it poses to your home, your family, and your property.

If something looks off, trust your instincts. It’s a lot easier (and cheaper) to address a problem early than after a failure.

📍 Fort Hunt | Mount Vernon | Alexandria
🌳 Sean Harman’s Tree Care, LLC

– Tree Risk Assessments (Level 2 & 3)
– Structural pruning & hazard mitigation
– Technical & crane-assisted removals

Send a message or call to schedule an evaluation.
703+-565-2676

21/04/2026

Jeff Inman taking the lead in the aerial rescue event during Day 1 preliminarys at the 2026 MAC-ISA Tree Climbing Championship.

Aerial rescue is one of the most technical events in competitive tree climbing, testing speed, communication, rope management, rescue technique, and victim care under pressure.

Extra points are awarded for properly supporting Woody after getting him safely to the ground.

Jeff Inman Takes the Lead in Aerial Rescue | Day 1 Preliminarys | 2026 MAC-ISA TCC