Red Drops on Philodendron: Root Rot from Poor Drainage

Red Drops on Philodendron: Root Rot from Poor Drainage

Mysterious blood-red drops on the carpet beneath a philodendron are typically spores or exudate from a root rot pathogen (often Phytophthora or Pythium) encouraged by poorly draining potting mix or excessive watering. The plant may appear healthy above ground while roots are rotting.

Corrective Actions

• Repot in a well-draining mix (add perlite or orchid bark).
• Ensure the pot has drainage holes and never sits in standing water.
• Water only when the top inch of soil is dry.
• Apply a fungicide drench labeled for root rot (e.g., mefenoxam) if caught early.

Discard severely affected plants to prevent spread to others.