Why does your Rhododendron prunifolium have sudden leaf drop? Diagnose the cause and fix it with our step-by-step guide.
Rhododendrons have shallow, fibrous root systems that are highly sensitive to moisture fluctuations. Rapid leaf drop in Plum-leaf Azaleas often occurs when the soil dries out completely or remains saturated, causing roots to suffocate or dehydrate.
This oomycete pathogen thrives in poorly draining soils common in acidic-loving species like R. prunifolium. The fungus attacks the root system, preventing nutrient transport and triggering an emergency shedding of leaves to reduce transpiration.
Plum-leaf Azaleas are susceptible to sudden shifts in microclimate, such as late spring frosts or intense heatwaves. Sudden leaf drop is a common defense mechanism used by the plant to enter dormancy when environmental conditions become non-viable.
As an acidophile, R. prunifolium requires specific pH levels to uptake micronutrients. If the soil pH rises too high, iron chlorosis occurs; while usually marked by yellowing, extreme deficiency can lead to premature senescence and leaf drop.
Your plant might also be experiencing one of these issues:
English
Italiano
