Which nutrient is represented as the second number on a fertilizer label?

The second number on a fertilizer label represents phosphorus. Fertilizers are typically labeled in a format known as the N-P-K ratio, where 'N' stands for nitrogen, 'P' stands for phosphorus, and 'K' stands for potassium. Each number corresponds to the percentage by weight of each nutrient in the fertilizer blend. Phosphorus is crucial for various plant functions, including root development, flowering, and fruiting. Understanding this aspect of fertilizer labeling helps in selecting the appropriate product for specific plants or growth stages, ensuring that nutrient needs are effectively met. In this case, phosphorus's role is vital in supporting overall plant health and productivity.