Why does your Anthurium andraeanum Sumi have yellow leaves? Diagnose the cause and fix it with our step-by-step guide.
Anthuriums are highly sensitive to moisture; saturated soil deprives roots of oxygen, leading to Pythium or Phytophthora fungal pathogens. This prevents the plant from transporting nutrients, causing older leaves to turn yellow and eventually drop.
The Sumi variety requires consistent micronutrients to maintain its dark foliage. A lack of nitrogen prevents chlorophyll production, leading to a uniform yellowing of the leaf blades starting from the older growth.
As tropical plants, Anthuriums require high humidity (above 60%). Low ambient humidity causes physiological stress that can manifest as yellowing and crispy edges on the leaf margins.
While Sumi loves bright light, direct afternoon sunlight can scorch the tissues. This damage often presents as yellow or bleached patches on the leaves that were directly exposed to the sun.
Your plant might also be experiencing one of these issues:
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