Mushrooms in Live Sphagnum: Harmless Fungi

Those Little Mushrooms Are Friends, Not Foes

Small brown mushrooms popping up in live sphagnum top‑dressing are the fruiting bodies of beneficial mycorrhizal fungi. They indicate a healthy, bioactive medium.

What to Do

• Leave them alone—they’ll disappear on their own.
• Pulling them only removes the cap; the mycelium remains.
• If sphagnum is thriving, the ecosystem is balanced.

On Insecticides

Neem oil is recommended for hobbyists because it’s organic, easy to find, and has fungicidal properties. Systemics (acephate, imidacloprid) are more effective but restricted (ag‑only, bee‑toxic). A detailed insecticide podcast is forthcoming.