Why does your Buddleja saligna have sudden leaf drop? Diagnose the cause and fix it with our step-by-step guide.
Pet FriendlyBuddleja saligna is sensitive to extreme soil moisture fluctuations. Sudden leaf drop often occurs when the roots are either suffocated by anaerobic conditions from waterlogging or desiccated due to prolonged drought, triggering a survival mechanism.
Rapid fluctuations in temperature, particularly late spring frosts or sudden heatwaves, can cause this species to shed foliage to protect its core structure. This is common when a newly budded plant is exposed to unseasonable weather.
If the soil remains poorly drained, fungal pathogens can attack the root system of the Willow-leaved Butterfly Bush. As roots decay, they lose the ability to transport water to the leaves, leading to rapid defoliation.
While less likely to cause 'sudden' drop compared to water stress, a severe lack of mobile nutrients can lead to chlorosis followed by leaf abscission as the plant reallocates resources to new growth.
Your plant might also be experiencing one of these issues:
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