---
title: Girdling Root: A Root That Strangles Its Own Trunk
url: https://battleborntreeservice.com/glossary/girdling-root/
business: Battle Born Tree Service
address: 6301 US Highway 50 East, Carson City, NV 89701
phone: 775.232.8243
hours: Office Monday-Friday 8:30 am-5:00 pm; phones answered seven days a week; 24-hour emergency service
credentials: ISA Certified Arborist WE-11728A on staff; Nevada Business License # 20131580674; fully insured
type: Tree service (removal, crane work, pruning, stump grinding, defensible space, snow removal, firewood)
---

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- [Arborist glossary](https://battleborntreeservice.com/glossary/)
- Girdling root

# What is a girdling root?

A girdling root is a root that grows around the base of a tree, pressing against the trunk or against other roots, instead of growing outward. As trunk and root get thicker, the root squeezes the trunk and can cut off the flow of water and sugars.

## How to recognise it

Signs include a flat or sunken side at the base of the trunk, a missing [root flare](https://battleborntreeservice.com/glossary/root-flare/) on that side, a root that curves back toward the trunk, and a crown that is thin or dying on the same side as the root. Some are visible only when the soil is moved. On a fast-growing tree the damage can build for years before the crown shows it.

Girdling roots often start when a root circles in a pot or grows against a hard surface, or when a tree has been planted too deep. In a lawn they can also be pushed in by buried obstacles.

## Why it matters here

Many Northern Nevada street and yard trees were planted in rows when subdivisions were built and have been growing against curbs, walks and foundations ever since. A root that grows into a pavement edge may turn, and a maple, honeylocust or ash that looks fine in summer can decline slowly from the base. See [silver maple](https://battleborntreeservice.com/tree-guide/silver-maple/) and [honeylocust](https://battleborntreeservice.com/tree-guide/honeylocust/).

A girdling root is also a stability issue. The roots that matter most for holding a tree up sit close to the trunk, in the [structural root zone](https://battleborntreeservice.com/glossary/structural-root-zone/). Take away or compromise one and the tree's grip changes.

## What an arborist does about it

The arborist exposes the base, looks at how many roots are involved and how much of the trunk is constricted, and decides whether pruning the offending root is safe for the tree. Taking out a large root is a judgement call, because it can cost the tree anchorage. Where the damage is advanced or the tree stands over a target, removal can be the honest answer. The assessment is part of a free estimate.

### Sources

- [International Society of Arboriculture, Trees Are Good: New Tree Planting (brochure)](https://www.treesaregood.org/Portals/0/siteContent/pdf/Web%20TAG%20brochures/TAG_CBweb_New%20Tree%20Planting_v3.pdf) (read October 17, 2026)

### Talk to the office

[775.232.8243](tel:775.232.8243)

| Monday to Friday | 8:30 am - 5:00 pm |
|---|---|
| Saturday and Sunday | Office closed, phones answered |

Phones answered seven days a week. 24-hour emergency service.

[Free estimate](#quote)

### Keep reading

- [Arborist glossary](https://battleborntreeservice.com/glossary/)
- [Tree roots, sidewalks and sewer lines](https://battleborntreeservice.com/guides/tree-roots-sidewalks-sewer-lines/)
- [Root barriers](https://battleborntreeservice.com/tree-services/root-barriers/)
- [Arborist consultation](https://battleborntreeservice.com/tree-services/arborist-consultation/)

## See also

[Root flare](https://battleborntreeservice.com/glossary/root-flare/) [Structural root zone](https://battleborntreeservice.com/glossary/structural-root-zone/) [Root pruning](https://battleborntreeservice.com/glossary/root-pruning/) [Buttress roots](https://battleborntreeservice.com/glossary/buttress-roots/)

## Read it in context

[Drought stress and dieback](https://battleborntreeservice.com/tree-guide/drought-stress-and-dieback/)