White Dust on Leaves? (Powdery Mildew Early Signs)
PM starts as tiny white specks; humidity + low airflow drive it.
Powdery mildew? White dust spots—see causes and analyze fast.
Common Causes
- High humidity/low airflow
- Dense canopy
- Cool nights with condensation
- Infected clones/equipment
How to Tell Which One You Have
Wipe test: white comes off; starts on shaded leaves.
FAQ
Can I wash it off?
Wipe + treat + fix airflow/humidity.
Baking soda spray?
Use approved fungicide; avoid residue on buds.
Remove leaves?
Cull worst leaves and improve airflow.