Fungus Gnats in Peace Lily: Organic Control Methods

A peace lily (Spathiphyllum) gifted after a father’s passing developed tiny flying gnats after repotting in organic soil. The expert identifies them as fungus gnats breeding in moist soil.

Non-Chemical Controls

• Dry the soil: Let top inch dry completely between waterings.
• Surface barrier: Add ½ inch of coarse coir, sand, or diatomaceous earth—sharp edges kill larvae.
• Potato traps: Place ½-inch raw potato slices on soil; larvae migrate into them. Discard daily until clear.
• Good drainage: Ensure pot has holes; empty saucers.

These methods break the lifecycle without harming the sentimental plant.