Girdling roots are one of the most common reasons a healthy-looking tree in Frankfort declines and dies years after planting, and most homeowners never notice the problem until the canopy starts thinning. If your tree was planted in the last 10-20 years, especially on a lot that was regraded or landscaped, it’s worth a look at the base of the trunk.
What Are Girdling Roots?
Girdling roots are roots that wrap around a tree’s trunk or its own other roots instead of growing outward, slowly strangling the tree and cutting off water and nutrient flow.
Because the damage happens underground and at the base of the trunk, it’s usually invisible until the tree is already stressed. By the time the canopy shows dieback, the root has often been constricting the tree for five to ten years or more.
Why Frankfort Yards See This So Often
Two things drive girdling roots on the trees we inspect around Frankfort. First, a lot of nursery-grown trees spend a season or two in a container before they’re sold, and roots that hit the wall of a pot start circling instead of growing straight out — if that root ball isn’t teased apart at planting, the circling pattern just continues underground. Second, mulch volcanoes (piling mulch high against the trunk, which we cover in our guide to volcano mulching damage) keep the root flare buried and moist, which encourages roots to grow up and across the trunk instead of down and out. Frankfort’s clay-heavy soil compounds both problems, since roots already have to fight harder to spread laterally.
Warning Signs to Check For
- No visible root flare — the trunk goes straight into the ground like a telephone pole instead of flaring out at the base
- A flat or dented side on an otherwise round trunk, where a root is pressing against the bark
- Thinning or dieback concentrated on one side of the canopy, matching the side of the girdling root
- Slow decline over several growing seasons with no obvious disease or pest present
- The tree rocking slightly at the base in wind, because the root system never anchored properly
What Can Be Done About It?
On a younger tree, a root-collar excavation (carefully digging out the soil around the base and cutting the offending root) can add years or decades to the tree’s life if it’s caught early. On a mature tree where a girdling root has already fused to the trunk, cutting it can do more harm than the root itself — removing a large girdling root sometimes opens a wound the tree can’t compartmentalize, which is why this isn’t a DIY job. We evaluate the size, position, and how long the root has likely been constricting before recommending excavation over just monitoring.
Typical cost for a root-collar excavation and evaluation on a residential tree in the Frankfort area runs $150-$450, depending on how deep the roots are buried and how many need to be addressed. That’s a general range, not a quote — every tree’s root structure is different once we’re actually digging.
If you’re planting a new tree this fall, see our guide on root damage and repair for how to check nursery stock for circling roots before it ever goes in the ground.
Frequently Asked Questions
Can a tree survive with girdling roots?
Yes, if caught early. A young tree with a small girdling root often recovers fully after excavation and removal of the root. A mature tree with a large, fused girdling root may survive for years but usually with reduced vigor.
How do I know if my tree has girdling roots without digging?
Look for a missing root flare at the base and check whether mulch or soil is piled against the trunk. If the trunk looks like a straight pole with no visible widening at ground level, girdling roots are a real possibility.
Should I remove mulch that’s piled against my tree’s trunk?
Yes. Pull mulch back 2-3 inches from the trunk so the root flare stays visible and dry. A 2-3 inch layer spread out in a donut shape, not a volcano against the bark, is the standard most arborists recommend.
Source: The Morton Arboretum — Tree Root Problems.
Not sure if your tree has girdling roots? Call or text us at (859) 310-1209 for a look, or
Last updated: September 20, 2026