crown rot on Orchid
Quick answer
If your Orchid has crown rot, the most likely cause is: Orchid crown rot ( apical meristem rot) occurs when water pools in the leaf axils where the growing tip meets the base of the plant. Unlike root rot, crown rot is caused by bacterial or fungal invasion (often Erwinia or Pythium) at the meristem, progressing upward from the center of the plant outward, distinctively causing the growing center to turn black and mushy while outer leaves remain initially green.
Start here:
- 1. Identify crown rot: central growing point (meristem) is black/mushy while outer leaves are green; distinct from leaf rot which starts from margins
- 2. Remove plant from pot and inspect roots — if crown rot is present, root system is likely still partially healthy
Why Orchid gets crown rot
Phalaenopsis spp.
Orchid crown rot ( apical meristem rot) occurs when water pools in the leaf axils where the growing tip meets the base of the plant. Unlike root rot, crown rot is caused by bacterial or fungal invasion (often Erwinia or Pythium) at the meristem, progressing upward from the center of the plant outward, distinctively causing the growing center to turn black and mushy while outer leaves remain initially green.
How to reverse crown rot on Orchid
- 1
Identify crown rot: central growing point (meristem) is black/mushy while outer leaves are green; distinct from leaf rot which starts from margins
- 2
Remove plant from pot and inspect roots — if crown rot is present, root system is likely still partially healthy
- 3
Cut away rotted crown tissue with sterile blade, removing all black/mushy central tissue
- 4
Dust cut surface with cinnamon (natural antifungal) or apply 3% hydrogen peroxide spray
- 5
Place in bright indirect light with excellent airflow; withhold water for 2 weeks to allow callusing
- 6
If meristem is fully destroyed, the plant cannot grow new leaves from center but may produce keiki from sides
Keep crown rot off this Orchid
Water orchids by soaking from below or pour water along the media surface — never overhead watering that leaves water in crown crevices. After watering, tip the pot slightly to drain any accumulated water from the crown area. Maintain 50-70% humidity without stagnation.