Powdery Mildew on Philodendron: Sulfur or Baking Soda Treatment

Confirmation

White, cotton-like spots on leaves and stems = classic powdery mildew. Common on philodendron in high humidity, low light, poor airflow.

Treatment Options

Application Protocol

1. Move plant outdoors or to shower.
2. Spray to runoff, covering all surfaces.
3. Repeat per schedule until no new spots appear.
4. Then monthly as prevention.

Cultural Fixes

• Increase light (bright indirect).
• Improve airflow (fan, spacing).
• Water soil only—keep leaves dry.
• Reduce humidity if >70%.

Sulfur is most reliable. Baking soda mix works for mild cases but requires diligence.