Cypress Knees in the Lawn: Cut, Grind, or Mulch?

Managing Bald Cypress Knees in a Dallas Front Yard

A 15-year-old bald cypress produces many knees between the tree bed and a plant bed, causing brown spots in the lawn. The owner has conflicting advice: cut knees under the canopy, only beyond it, or not at all. Some suggest grinding.

Expert Consensus

• Safe to cut knees at ground level anywhere. They are root expansions; removal doesn't harm the tree.
• Grinding below soil is untested; could damage main roots.
• Knees will likely regrow; new ones appear over time.
• Shade from the canopy is the real reason grass fails.

Best Long-Term Solution

Replace turf with a mulch bed and shade-tolerant groundcover. This eliminates mowing conflicts and looks natural. For foundation concerns, roots spread 1.5x branch width (45–60 ft for mature bald cypress). Install root barriers if the tree is too close to the house.