Potassium sulfate (K₂SO₄), commonly known as sulfate of potash, is a vital fertilizer widely used in agriculture to enhance plant growth and optimize crop yields. Its unique composition includes potassium, an essential macronutrient, and sulfate, a form of sulfur that plants require for various metabolic processes. This article discusses the significance of potassium sulfate fertilizer, its benefits, and its role in sustainable agriculture.