Crown rot
Yellowing that starts in the center where the newest leaves emerge is the dangerous one — this is crown rot.
Diagnosis
Crown rot
What's happening
When water collects and sits in the crown — the central point where new leaves grow — that trapped moisture lets rot set in. The newest leaves yellow, then brown and go soft at the base and pull away with a gentle tug. Crown rot can kill a Phalaenopsis quickly because it destroys the only growing point.
How to fix it
Act fast. Move the plant somewhere with good airflow and stop watering into the crown — always water at the bark, never over the center. Gently remove any mushy, blackened leaves. Dust the affected crown with cinnamon, a natural fungicide, and keep the crown dry and well-ventilated. Always tip out water that pools in the crown after watering or misting, especially if the plant sits in a cool or still room overnight.
What fixes it
- Orchid bark for chunky mixes — Repotting into fresh, airy orchid bark improves drainage and airflow so moisture stops collecting around the crown.
If that doesn't fix it
This is general guidance based on common symptoms; individual plants vary.
Read the full Moth Orchid care guide →
Reviewed June 2026 · how we check this