Leaf Septoria? (Yellow Leaf Spot Disease)
Septoria causes yellow spots with dark borders on lower leaves, spreading upward. Fungal disease thrives in humid conditions.
Leaf septoria on cannabis? Yellow spots spreading—see causes and analyze fast.
Common Causes
- High humidity over 60%
- Poor airflow
- Infected soil or debris
- Overhead watering
How to Tell Which One You Have
Yellow spots with dark brown centers on lower leaves. Spots merge, leaves yellow and drop. Spreads upward.
FAQ
Treatment?
Remove affected leaves, improve airflow, reduce humidity. Use copper fungicide if severe.
Spread to buds?
Rarely, but weakens plant. Control early to prevent spread.
Prevent?
Keep humidity under 55%, water at base, remove lower leaves, sanitize tools.