Mold on Indoor Plant Soil: Why Repotting Is the Best Cure

Surface Fungus

Feeds on decomposing organic matter. Mostly ugly, not harmful.

Temporary Fixes

• Rake soil surface regularly.
• Fungicide drench (short-lived).

Permanent Fix: Repot

Soil breaks down in pots—particles shrink, compaction slows drainage and root growth. Fresh, loose potting soil discourages fungus. Repot every 2 years for healthier plants and no mold.