Earthworm Castings on Zoysiagrass: Aesthetic Nuisance, Not a Problem

A homeowner with Meyer zoysiagrass wanted to eradicate earthworms due to unsightly castings. The expert strongly advised against it—worms are beneficial, and most pesticides are tested to avoid harming them. The best solution: wash castings away with a hose. They break down quickly and enrich the soil.

Perspective Shift:

• Castings = free fertilizer and aeration.
• Worms indicate healthy soil biology.
• Rake or water them in; don't kill the worms.

Embrace the castings as a sign of a living lawn.