What is a visible sign of phosphorus deficiency in plants?

Phosphorus deficiency in plants is often indicated by visible signs such as older leaves turning purple, particularly at the tips. Phosphorus is crucial for energy transfer and synthesis of nucleic acids, which are essential for proper plant growth and development. When a plant lacks phosphorus, it struggles to perform essential functions, leading to the characteristic purple coloration in older leaves as the plant starts reallocating nutrients to newer growth.

The brown tips may also occur, particularly when the deficiency is severe, as a result of overall stress on the plant. This deficiency can also impact flowering and fruiting, as phosphorus plays a key role in these processes. Recognizing these signs helps in identifying nutrient deficiencies early on and allows for intervention to promote healthy plant growth.

Other options may describe symptoms related to different nutrient deficiencies or environmental stressors, highlighting the importance of correct diagnosis in plant care.