Why does your Anthurium andraeanum Sierra Orange have yellow leaves? Diagnose the cause and fix it with our step-by-step guide.
Anthuriums are highly susceptible to waterlogging; excessive moisture in the substrate suffocates the roots, leading to a lack of oxygen and subsequent yellowing of the foliage. This often triggers Pythium or Phytophthora species which decay the root system.
A lack of available nitrogen prevents the production of chlorophyll, causing older leaves to turn uniformly yellow before progressing to newer growth. This is common in Anthuriums if the potting medium has become depleted over time.
Too much direct sunlight can cause chlorosis or bleaching, while too little light prevents the plant from photosynthesizing efficiently, leading to pale, yellowing leaves. The 'Sierra Orange' cultivar requires bright, indirect light to maintain its vibrant pigmentation.
Anthuriums are tropical plants that thrive in temperatures between 65°F and 80°F; exposure to drafts or temperatures below 60°F can cause metabolic shock, manifesting as yellowing leaves.
Your plant might also be experiencing one of these issues:
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