Phalaenopsis Losing Leaves During Bloom: Crown Rot Risk & Repotting

Bonnie's Phalaenopsis (bloomed 3× in 1.5 years) suddenly dropped a green leaf and a yellow one while in full bloom. She asked whether to keep the plant.

Leaf Loss During Bloom = Red Flag for Root/Crown Issues

Phalaenopsis rarely shed healthy leaves during flowering. Sudden loss suggests:

• Root rot from degraded, water-retentive mix (common in big-box store plants).
• Crown rot if water sits in the leaf center overnight.

Emergency Assessment & Repotting

1. Unpot immediately. Rinse roots. Discard mushy/stringy roots.
2. If no leaves remain, survival is unlikely but possible—repot anyway for the learning experience.
3. Use coarse fir-bark mix (Better Gro brand recommended by AOS), soaked 1+ hours.
4. Plastic pot with many drainage holes. No standing water.
5. Drain overnight; withhold water 1 week.

Big-Box Store Warning

Most mass-market retailers lack trained orchid staff. Plants are often sold in deteriorated mix with incipient root rot. Repot promptly after purchase (or after current bloom) regardless of source.