Yellowing leaves are a clear sign that a houseplant is experiencing stress, and they can indicate several underlying issues. Overwatering is one of the most common causes. Excess water can suffocate roots, leading to poor nutrient uptake, yellowing leaves, and eventual leaf drop. On the other hand, underwatering dehydrates the plant, causing the leaves to lose their vibrant green colour and turn yellow or brown at the edges.
Light conditions are also important. Too little light may cause older leaves to yellow as the plant redirects energy to new growth, while excessive direct sunlight can scorch leaves and lead to yellow patches. Nutrient deficiencies, especially a lack of nitrogen, magnesium, or iron, are another frequent cause of yellowing. Seasonal changes may naturally cause older leaves to yellow and drop as the plant enters slower growth periods, particularly in autumn and winter.
To address yellow leaves, check your watering routine, adjust light exposure, and fertilise with a balanced houseplant feed during the active growing season. Remove affected leaves to encourage healthy new growth.