Why does your Sedum morganianum have white powder? Diagnose the cause and fix it with our step-by-step guide.
This fungal pathogen thrives in high humidity and poor air circulation around the dense, trailing leaves of Sedum morganianum. It manifests as a white, flour-like coating on the leaf surfaces.
These small insects secrete a white, waxy, cottony substance to protect themselves. In Burro's Tail, they often hide deep within the crevices where the leaves meet the stem.
If you water your Sedum from above, dried calcium and magnesium from tap water can leave white, crusty residues on the fleshy leaves. Unlike fungus, this is inorganic material left behind after evaporation.
Certain types of scale insects produce a white, powdery or waxy coating as they feed on the plant's sap. This can eventually lead to yellowing and dropping of the succulent leaves.
Your plant might also be experiencing one of these issues:
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