Why does your Rhododendron argyrophyllum have sudden leaf drop? Diagnose the cause and fix it with our step-by-step guide.
This oomycete pathogen thrives in waterlogged soils, causing decay of the fine feeder roots. As the root system fails, the Silver-leafed Rhododendron can no longer support its foliage, leading to rapid, sudden defoliation.
Rhododendron argyrophyllum is sensitive to rapid shifts in temperature or sudden changes in humidity. If the plant was recently moved or exposed to a cold snap, it may drop leaves as a physiological defense mechanism.
Despite being moisture-loving, extreme dehydration causes the plant to shed leaves to reduce transpiration. This is particularly common if the silver underside of the leaves cannot regulate moisture due to dry substrate.
Certain fungal pathogens can cause rapid leaf senescence and drop if conditions are excessively humid without airflow. The infection compromises the leaf tissue, signaling the plant to abscise the foliage.
Your plant might also be experiencing one of these issues:
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