Why does your Rhododendron flammeum have yellow leaves? Diagnose the cause and fix it with our step-by-step guide.
Rhododendrons are acid-loving plants; if the soil pH rises above 5.5, iron becomes chemically unavailable to the plant, causing interveinal yellowing in young leaves.
Excessive moisture or poor drainage in the substrate leads to fungal pathogens attacking the root system, preventing nutrient transport and causing overall leaf yellowing.
A lack of available nitrogen in the soil prevents chlorophyll production, leading to a uniform yellowing that often starts with older, lower leaves.
Inconsistent watering cycles cause the plant to lose leaf turgidity and undergo chlorosis as a stress response to desiccation.
Your plant might also be experiencing one of these issues:
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