Yellow Fungus on Mulch: Why It's a Good Sign and How to Manage Appearance

What It Is

Bright yellow growth on mulch is a slime mold or saprophytic fungus—normal decomposers of dead wood. They enrich soil by recycling nutrients.

Management

Rake to disperse and hide yellow patches. They may reappear but are harmless and indicate a healthy, active soil ecosystem.

No Treatment Needed

Do not apply fungicides. The fungus is beneficial, not a disease.