Why does your Hydrangea macrophylla Magical Green Waves have white cottony spots? Diagnose the cause and fix it with our step-by-step guide.
Small, soft-bodied insects that secrete a white, waxy, cottony substance to protect themselves. In Hydrangeas, they often cluster in the axils of leaves and stems, sucking sap and causing leaf yellowing.
A type of scale insect that produces a thick, white, felt-like covering. As they feed on the Green Waves Hydrangea's sap, they can cause leaves to become distorted and sticky due to honeydew secretion.
While typically presenting as a fine dust, heavy fungal colonization can sometimes appear as tufted, white patches on foliage. This is common in Hydrangeas kept in areas with high humidity and poor air circulation.
Your plant might also be experiencing one of these issues:
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