Why does your Begonia coccinea have yellow leaves? Diagnose the cause and fix it with our step-by-step guide.
Begonia coccinea is highly susceptible to fungal pathogens like Phytophthora if the substrate remains saturated. Excess moisture deprives the roots of oxygen, leading to cellular death and subsequent yellowing of the foliage.
A lack of nitrogen prevents the production of chlorophyll in the older leaves of the Scarlet Begonia. This typically manifests as a uniform yellowing that starts with mature leaves and moves toward the new growth.
While Begonia coccinea enjoys bright indirect light, prolonged exposure to direct afternoon sun can cause leaf scorch and chlorosis. Conversely, too little light can lead to weakened stems and pale, yellowing leaves.
This species is tropical and sensitive to sudden drops in temperature. Exposure to cold drafts from windows or air conditioning units can trigger a physiological stress response resulting in yellow leaf drop.
Your plant might also be experiencing one of these issues:
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