Root Collar Excavation is Critical to Your Tree's Survival!

A buried root collar is a serious health issue for a tree or shrub. It is a common issue in the urban landscape, one that can usually be fixed through excavation.

Why is a buried root collar so bad for a tree? It’s just dirt and mulch piled around the base of the trunk!

Trees and shrubs have different parts that have adapted to certain conditions. The roots of a plant are able to grow in the soil and soak up moisture. The trunk is not. It grows above ground where conditions are dry.

But when mulch or dirt is piled around the base of a trunk (this area is called the root collar), it stays moist thereby suffocating cells due to water saturation. This harms the cells of the trunk.

As the cells become damaged, they are not able to perform their duties, which include gas exchange and moving food through the plant, just to name a few.

Furthermore, this mound allows the tree’s roots to grow around the trunk.

As the roots encircle the trunk, the begin girdling it. The girdling action literally strangles the tree and deprives roots and canopy of necessary resources.


But the story gets worse.

As the tree declines in health, it becomes more susceptible to attack from insects, diseases, and harmful fungi, which cause further harm.

To give an analogy, a human with a weak immune system is more vulnerable to catching colds, the flu, and other sicknesses.
The solution is to excavate the root collar to ensure it stays dry.
The excavation must be done using an an air tool powered by compressed air, such as an Air Spade.

Using digging tools instead of compressed air will damage the tree’s roots and cause more harm than good.

After excavating the root collar, prune away girdling and adventitious roots.

The root pruning can be especially tricky and may need to be staged across several years.

Properly excavating a root collar is a delicate process. If you do not have experience with this procedure, we recommend hiring an experienced professional rather than attempting to do it yourself.

Like this article? Pass it on.

Related Articles

Tree & Shrub Care
Happy Trees Grow From Healthy Soil
Crape Myrtles: A Tale of Love, Murder, and Proper Pruning
Tree Care: Save Money and Increase Your Property Value
Video | Drop That Rake: Save Time and Money by Leaving Your Leaves
Project Pando: Native Seed Drive 2021
Video | How to Plant a Tree: The Definitive Guide to Proper Planting
10 Simple Steps to a Perfectly Planted Tree or Shrub
Video | 3 Ways City Life Stresses Trees (And What You Can Do to Help)
Why is Tree Care Important? Outside of the Forest, Trees Face Unique Challenges.
Emerald Ash Borers are Killing Trees. A Simple Treatment Can Stop Them.
Video | Did you know? The secret to fertilizing your trees and shrubs without using chemicals.
Chemical Fertilizers: 3 Surprising Myths and Why You Should Choose Organic Matter Instead
4 Options for Fertilizing Trees and Shrubs the Cheap, Easy, and Healthy Way
Video | 4 Fundamentals of Tree Care
Not sure how to care for your trees? 4 Simple Steps to Happy, Healthy Trees
[Parody] Video | Introducing Timber: the Only Dating App for Trees
Video | Introducing Archie the Arborist: 5 Amazing Tree Facts
We Show That We Care: The History of Project Pando
How to Spot a Pine Borer Infestation
Video | How to Plant a Tree: 5 Questions to Ask Before You Pick Up a Shovel
Drop that shovel! 5 Questions to Ask Before Planting
10 Native Trees to Plant in Central North Carolina
Holiday Gift Guide for That Special Tree in Your Life
Measure What Matters
Video | Wood Chips: The Secret Ingredient to Healthy Trees
Top 10 Reasons to Choose Wood Chips Over Other Types of Mulch
Healthy Eating Plate for Trees
Video | Welcome to Project Pando
Video | Structure is Strength - How to Make your Trees More Safe Using Pruning.
Are Your Trees Safe? Prune to Make Them Stronger.
How to Select a Safe Branch for a Tree Swing
Your Dirt is Hungry
Video | Soil is Alive
Recipe: Savory Soil Casserole
How Trees Can Save Earth & What We Can Do to Help
Earth Day Bingo
Video | How Trees Can Save the Earth
Spring Tree Care Checklist
Spring Scavenger Hunt
Don't Make a Deadly Mistake: Top 10 Questions to Consider Before Pruning
Video | Planning to Prune? Use this simple framework and avoid deadly mistakes.
Video | Rooted by Our Purpose: A New Direction at Leaf & Limb
Why Dead Wood is Good Wood
Video | Want more birds in your backyard? Plant these native trees.
Best Native Trees for Butterflies
Fall & Winter Tree Care Checklist
Video | Fall Tree Care Checklist: Leave your Leaves, Plant New Trees, and Other Important Tasks
Top 10 Most Surprising Benefits of Trees
How I Learned to Love to My Trees
Video | Trees are Critical to Our Future
Think Your Tree is Dead? Look a Little Closer
How to Spot a Dead or Dying Tree
Video | How to Spot the Warning Signs: Dead, Dying or Hazardous Trees
Right Tree, Right Place: What to Plant and Where to Plant it
Video | How To: Choosing the Right Tree for Any Location
Our Favorite Tree Recommendations for Tricky Areas
Using Fertilizer? Think Twice Before You Do.
The #1 Reason Most Soil Tests Don't Work
Friend or Foe: When to Take Action Against Pests
The Insect Apocalypse is Here. How Can You Help?
16 Fascinating Facts About Fungi
Mycorrhizal Fungi: The Unsung Heroes of Tree Care
Case Study: Watch How Soil Improvement Turned this Tree from Sickly to Stately
From Dead Dirt to Healthy Soil in 7 Simple Steps
6 Pruning Mistakes to Avoid
How to Install and Enjoy Your Rain Gauge
Help Save the Monarch Butterflies!
4 Fascinating Facts About Mistletoe
Proper Care for Newly Planted Trees
8 Ways to Accidentally Kill Your Tree When Planting
Drop that Rake! Why Leaving the Leaves is Vital to Your Trees's Health
Save Time This Fall: Leave Your Leaves
Video | How To: The Fundamentals Of Watering
Video | The Fundamentals of Mulch: Proper Care, Installation, and Selection
Too Many Choices: Which Mulch or Weed Barrier Should I Choose?
When Good Mulch Goes Bad
How To: The Fundamentals of Mulch Installation
Five Ways to Spot a Thirsty Tree or Shrub
Soaker Hoses, Irrigation Systems, and Treegators, Oh My!
Drought Resistant Trees
How To: The Fundamentals of Watering
The Joy of Planting Native Trees in Durham, North Carolina
Brightening Up Neighborhoods Across Durham
Changing lives one seed at a time in Durham
Soil Decompaction - An Essential for Good Tree Health
Emerald Ash Borer is in NC!
Cabling & Bracing - Options for Making Your Tree Safer
Tree Care for Crape Myrtles
How to Prevent Tree Damage
Help! My Tree Has a Disease!
Dragon’s Blood Tree
Deep Root Fertilization: Myths & The Truth
The Dangerous Truth About Ghost Insurance Policies
Happy Trees Begin With Proper Planting
Trees & Shrubs Need Check-Ups Too!
How To Protect Your Trees from a Lightning Strike
Mulching: A Cheap, Easy Way to Increase the Health of Your Trees!
Crape Myrtles: A Tale of Love, Murder, and Proper Pruning
The World's Oldest Trees
Help! Insects are Attacking my Trees & Shrubs!
Tree Care: Save Money and Increase Your Property Value
Root Collar Excavation is Critical to Your Tree's Survival!
Tree Risk Assessment: The Key to Safer Trees & Peace of Mind!
10 Tips on How to Choose the Right Tree Service and Avoid Scams
Happy Trees Grow From Healthy Soil
TCIA Accreditation: Empowering You With Confidence
What is Tree Care?
Mulch Volcanoes: the Mt. St. Helens of Tree Problems
Trees Need a Thriving Soil Food Web
Call Leaf & Limb