Why does your Rhododendron molle have yellow leaves? Diagnose the cause and fix it with our step-by-step guide.
Rhododendron molle is an acid-loving species that requires a low pH to uptake iron. If the soil becomes too alkaline, the plant cannot absorb iron, leading to interveinal chlorosis (yellow leaves with green veins).
Excessive moisture in poorly draining soil suffocates the roots of this species, leading to fungal pathogens like Phytophthora. This prevents water and nutrient transport, causing overall leaf yellowing and eventual wilting.
A lack of nitrogen in the growing medium prevents the production of chlorophyll. In Rhododendrons, this typically manifests as a uniform yellowing starting from the older, lower leaves.
Rhododendron molle has relatively soft leaves with high transpiration rates, making them sensitive to dry spells. Prolonged lack of moisture causes the plant to shed chlorophyll and turn yellow as a survival mechanism.
Your plant might also be experiencing one of these issues:
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