Fixing Landscape Blocks Pushed by Tree Roots

Tree Roots Lifting Landscape Edging

A homeowner installed landscape blocks around trees, but expanding trunks are pushing the blocks up. They ask if they can cut the roots to level the blocks.

Assessing the Situation

This is common with shallow-rooted trees like maples. Cutting a few isolated surface roots with an axe or hatchet usually won't harm the tree, but avoid trenching near the trunk.

Better Long-Term Solution

Enlarge the tree ring (mulch bed) to move the edging farther from the trunk. This accommodates future root growth and protects the tree's root flare. Remove the blocks, expand the mulched area, and reinstall edging at a greater distance.

Caution

Never cut large structural roots or create a continuous trench around the tree. This can destabilize the tree and invite decay.