Why does your Rhododendron maximum 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, leading to yellowing between leaf veins.
Excessive soil moisture or poor drainage in heavy soils leads to fungal pathogens attacking the root system, disrupting water and nutrient transport.
A lack of nitrogen in the soil causes older leaves to lose their chlorophyll and turn uniformly pale yellow.
High levels of salts from fertilizers or road runoff can cause leaf burn and chlorosis in Great Laurel.
Your plant might also be experiencing one of these issues:
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