Crown Rot in New Phalaenopsis: Overwatering and Repotting

Orchid Leaves Turning Soft and Spongy: Crown Rot

Elizabeth, new to orchids, has a small Phalaenopsis for 2 weeks, not repotted. Waters twice weekly (pours water through, drains into sink, no saucer). Plant in bathroom, no direct sun. Top leaves soft/spongy near stem; lower leaf soft and crinkly at edges. Bark has green growth (algae/moss). Worried about crown rot.

Expert Response

Elizabeth, photo shows start of crown rot. Will likely lose top leaves; hopefully self-limiting. Cut off affected leaves with sterile blade. Crown rot is fungal—treat with cinnamon or antiseptic mouthwash after removal to reduce spread. Reduce watering; let mix dry. Water once per week to ten days, early morning. Keep temp above 60°F. Degraded mix may also indicate root rot. After flowering, repot in fresh orchid mix. When unpotting, rinse roots, remove mushy ones. Healthy roots are firm, turn green when wet. Since plant recently acquired, damage likely occurred before purchase; some nurseries replace within short period. Many garden center staff lack orchid knowledge; suppliers give bad advice. Crown rot can destroy plant if spreads deep into crown.