Stem Rot on Cannabis? (Collar Rot)
Stem rot is fungal infection at stem base causing brown mushy tissue. Can kill entire plant if not caught early.
Stem rot on cannabis? Brown mushy stem base—see causes and analyze fast.
Common Causes
- Overwatering
- Poor drainage
- Buried stem too deep
- High humidity at soil level
How to Tell Which One You Have
Brown soft mushy area at stem base, plant wilts despite wet soil, foul smell, white/gray mold.
FAQ
Save it?
Difficult. Cut away rot, apply fungicide, improve drainage. May not survive if severe.
Spread?
Yes, through soil and water. Isolate affected plants.
Prevent?
Don't overwater, good drainage, don't bury stem, airflow at base, hydrogen peroxide drench.