Yellow Mold on Rubber Plant Soil: Harmless but Indicates Overwatering Risk

Yellow Mold on Rubber Plant Soil: Harmless but Indicates Overwatering Risk

Two Rubber Plants bought 6 months ago. One sheds leaves with yellow mold on soil; the other in sunnier spot is fine. Moldy plant was near intake vent (draft). Owner moved it.

Mold

Fungus spores in soil; thrives in cool, dim, moist conditions. Harmless to plant. Scrape off persistently. If from added soil, don't reuse it.

Real Issues

• Pot too large (14") → retains moisture → mold & root rot risk. Let top ¼ soil dry between thorough waterings.
• Insufficient light → the sunnier plant is healthy. Move to brighter spot.

Address pot size and light; mold will disappear with dryness.