Why does your Anthurium andraeanum Arion have yellow leaves? Diagnose the cause and fix it with our step-by-step guide.
Anthuriums are highly susceptible to root hypoxia; excessive moisture in the potting medium prevents oxygen from reaching the roots, leading to fungal pathogens like Phytophthora. This disrupts the plant's ability to transport nutrients, manifesting as chlorosis (yellowing) starting with older leaves.
The 'Arion' cultivar requires consistent nutrient availability to maintain its deep green foliage. A lack of nitrogen often causes uniform yellowing of older leaves, while magnesium deficiency can cause interveinal chlorosis specifically on mature foliage.
While Anthuriums thrive in bright indirect light, direct sunlight can scorch leaves, while too little light prevents photosynthesis, causing the plant to shed older foliage through yellowing. In low light, the plant cannot sustain its metabolic processes.
Anthurium 'Arion' is a tropical species that prefers stable, warm temperatures. Exposure to sudden cold drafts from air conditioning or windows can shock the plant's vascular system, causing leaves to turn yellow and wilt.
Your plant might also be experiencing one of these issues:
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