Mushrooms in Houseplant Soil: Causes and Control

Tiny white mushrooms in potting soil are fungal fruiting bodies from spores in the mix. They thrive in cool, damp, low-light conditions with organic-rich soil. While not directly harmful to plants, they indicate cultural issues.

Common Causes

• Unsterilized or garden soil in the mix
• Poorly draining, compacted soil
• Food residues (coffee, soda) added to soil
• Constantly wet soil in low light

Control Methods

Scrape off mushrooms and surface soil, including white mycelial threads. Spray diluted alcohol on soil surface. Let soil dry thoroughly between waterings. Move to warmer, brighter location. Repeat as needed. Peat-based soilless mixes prevent recurrence. Severe cases may need systemic fungicide drench.