Potassium fertilizer is a type of plant nutrient that provides potassium, an essential mineral for plant growth. It helps improve water regulation, enzyme activation, and overall plant health. Potassium is crucial for processes like photosynthesis and the synthesis of proteins, making it vital for crop yield and quality. There are various forms of potassium fertilizers, including potassium chloride, potassium sulfate, and potassium nitrate. These fertilizers can be applied to soil or used in liquid form for foliar feeding. Proper application of potassium fertilizer can enhance plant resilience against diseases and environmental stressors.