Orchid Leaves Falling Off: Deciduous vs. Cultural Problems Diagnosis

First: Identify Your Orchid

Without name, diagnosis is speculative. But two possibilities exist:

Possibility 1: Natural Deciduous Cycle

Some orchids (certain Dendrobiums, Catasetums, etc.) lose leaves in fall—dormant, not dead. They bloom on leafless canes late winter/spring. Keep dry until new growth appears.

Possibility 2: Cultural Problems (Non-Deciduous Types)

Overwatering: Mix must become barely moist between waterings. Constant wet = root rot.

Water on leaves overnight: Fungus/bacteria breeding ground. Water mornings only. Air movement helps drying.

Insect infestation: Mealybugs/scale on leaf undersides suck plant juices. Prolific breeders—check weekly.

Next Steps

Identify orchid type. Check roots. Adjust watering timing. Inspect for insects. Provide air movement.