Cymbidium Bulb Rot in Hawaii: Potting Mistakes, Tree Mounting, and Vendor Wisdom

Diagnosing the Rot

Loretta's cymbidium bulbs rotted after two weekly waterings in cement pots inside decorative containers on a rainy Oahu patio. The cement pots likely prevented drying, and wind-driven rain added excess moisture.

Pot-in-Pot Problems

Decorative outer pots without drainage trap water. Even with drainage, they reduce air flow. Cymbidiums need excellent drainage and air movement around roots.

Tree Mounting Alternative

Smaller cymbidiums (3+ mature bulbs) can be mounted on trees—especially pendulous types that bloom downward for spectacular displays. This mimics their natural epiphytic habit.

Vendor Insights

The Volcano vendor (possibly Bob Harris) recommended largest bulbs, but smaller plants adapted better. Harris specializes in warmth-tolerant cymbidiums for Hawaii's lack of winter cooling below 45°F.

Leaf Trimming Myth

Unlike lilies/agapanthus, don't cut cymbidium leaves—they're vital for photosynthesis and energy storage.