What is a common sign of over-fertilization in plants?

Browning leaf tips is a common sign of over-fertilization in plants because it indicates that the concentration of salts or nutrients in the soil has become too high, leading to root damage or nutrient burn. When plants absorb excess nutrients, particularly nitrogen, it can cause the leaf edges to dry out and turn brown as the plant struggles to manage the overload. This phenomenon is quite noticeable, as it often starts at the tips of the leaves and can spread if the over-fertilization continues.

The other signs, such as wilting leaves, slow growth, and yellowing stems, may indicate issues like inadequate watering or nutrient deficiencies rather than specifically pointing to over-fertilization. These conditions reflect different stresses on the plant that do not directly correlate to the nutrient excess that causes browning tips. Understanding the specific signs and their causes is essential for proper plant care and ensuring optimal growth conditions.