Why does your Phalaenopsis Alghero have sudden leaf drop? Diagnose the cause and fix it with our step-by-step guide.
Overwatering or poor drainage causes the roots to suffocate and decay, preventing the orchid from transporting water to the leaves. As the root system fails, the plant sheds leaves as a survival mechanism to reduce transpiration.
Phalaenopsis orchids are tropical plants that thrive in stable warmth; sudden exposure to cold drafts or a rapid drop in temperature can trigger an emergency physiological response resulting in leaf abscission.
A bacterial infection can rapidly degrade plant tissue, often starting at the base of the leaf or near the crown. As the infection spreads through the vascular system, the plant may drop leaves to isolate the necrotic tissue.
If the potting medium has become completely bone-dry for an extended period, the orchid may shed older leaves to conserve moisture for the new growth and the crown.
Your plant might also be experiencing one of these issues:
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