How to recognize

Soft, floury film on upper/lower leaf surfaces and stems; spreads from crowded areas. New leaves may twist or stunt; older leaves show patchy white colonies.

Immediate actions

  • Prune worst-infected leaves into a bag; sanitize shears between cuts.
  • Increase airflow (small fan on low) and avoid wet leaves overnight.
  • Apply labeled mild options weekly (e.g., sulfur, potassium bicarbonate, bio-fungicides); rotate actives.

Prevention

Space plants, water at soil level in the morning, and thin dense canopies. Keep humidity stable and avoid big temperature swings at night.