Surface Roots in Atlanta Trees: Diagnosis & Management Guide

What Are Surface Roots?

Surface roots are large structural roots that grow at or just above the soil line rather than deeper underground. They form as trees age and roots thicken naturally, and when compacted, shallow, or poorly drained soils force roots to stay near the surface where oxygen is available. This is a cultural and soil condition, not a disease or pest issue.

How to Recognize It

• Visible roots running along the lawn surface near the trunk and out toward the canopy edge
• Thin or bare patches of grass directly above the roots where turf cannot establish
• Mower damage on the tops of roots, including stripped bark and shallow cuts
• Tripping hazards in the lawn or along walkways
• Lifted or cracked sidewalks, driveways, or patios near mature trees
• Soil washing away from around the base of the tree, exposing more root material over time

Surface roots are a year-round condition rather than a seasonal one, but they become most noticeable in spring and summer when homeowners begin mowing and watering, and after heavy Atlanta rains when erosion exposes additional root material.

Why It Matters for Atlanta Trees

Surface roots themselves are not a disease and rarely threaten the tree's life, but the problems around them can be serious. Repeated mower strikes create wounds that invite decay fungi and wood-boring insects, and cutting large surface roots to clean up the lawn can destabilize the tree and increase the risk of failure during storms. Lifted hardscape and tripping hazards also create real liability and human safety concerns for homeowners.

In Atlanta's heavy clay soils, the condition is especially common on silver maple, red maple, willow oak, pin oak, water oak, sycamore, tulip poplar, sweetgum, American beech, river birch, and southern magnolia. If you have any of these species in a lawn area, surface rooting is something to plan around rather than fight.

General Prevention

• At planting, choose species suited to your soil and give them adequate room. In tight or compacted Atlanta clay soils, avoid notoriously shallow-rooted species like silver maple close to lawns and walkways.
• Apply a 2 to 4 inch layer of shredded wood mulch over the root zone, extending out toward the drip line, and keep mulch pulled back several inches from the trunk. Never pile mulch volcano-style against the bark.
• Protect the root zone from compaction. Keep vehicles, heavy equipment, and repeated foot traffic off the area under the canopy, especially during construction or landscaping projects.
• Replace turf under mature trees with mulched beds or shade-tolerant groundcover instead of fighting the roots with a mower, and never cut large surface roots in an attempt to flush-mow over them.

What NOT to Do

• Do not self-diagnose. Many tree problems look alike, and treating the wrong one wastes time and can harm the tree.
• Do not apply fungicides, insecticides, or other chemicals without an arborist's specific recommendation. Wrong product or wrong timing makes things worse.
• Do not cut, grind, or bury exposed surface roots under added topsoil. Severing structural roots can weaken the tree's anchorage, and piling soil over the root zone smothers the fine roots that depend on surface oxygen.

Related Services

For most diagnosis and treatment questions, the right starting point is one of our services:

• ISA-Certified Arborist Services: diagnosis, consultation, second opinion
• Plant Health Care (PHC): ongoing tree health management
• TRAQ Tree Risk Assessment: when the tree may be a safety hazard

Sources

This page summarizes general information from: University of Wisconsin-Madison Division of Extension, University of Kentucky Cooperative Extension, and Purdue University Extension.