Sulfur is an essential element for plant growth and development. Sulfur fertilizer refers to any material or product that provides plants with a supplemental supply of sulfur. Sulfur is one of the macronutrients required by plants in relatively large amounts, alongside nitrogen, phosphorus, and potassium. It plays a crucial role in various metabolic processes within plants, including the synthesis of amino acids (building blocks of proteins), enzymes, and vitamins.