Why does your Alocasia macrorrhizos have yellow leaves? Diagnose the cause and fix it with our step-by-step guide.
Alocasia macrorrhizos is highly susceptible to fungal pathogens like Phytophthora if the substrate remains saturated. Excess moisture deprives roots of oxygen, causing cell death and characteristic yellowing that often starts with older leaves.
As heavy feeders, Giant Alocasias require consistent fertilization. A lack of nitrogen causes uniform yellowing of older leaves, while magnesium deficiency often presents as chlorosis between the leaf veins.
This tropical species thrives in high humidity; dry indoor air can cause the edges of the leaves to yellow and crisp. Sudden changes in temperature or drafts can also trigger a stress response in large foliage.
While they love bright light, direct midday sun can scorch the large surface area of Alocasia macrorrhizos leaves. This thermal damage manifests as yellow or bleached patches on the parts of the leaf most exposed to the sun.
Your plant might also be experiencing one of these issues:
English
Italiano
