13:00:45. A water-soluble fertilizer with an optimum combination of Nitrogen, Phosphorous, Potassium, and Sodium. It is readily soluble in water and is best for drip irrigation and foliar application of fertilizer.

Potassium nitrate is a chemical compound with the chemical formula KNO
3. This alkali metal nitrate salt is also known as Indian saltpetre (large deposits of which were historically mined in India). It is an ionic salt of potassium ions K⁺ and nitrate ions NO₃⁻, and is therefore an alkali metal nitrate. It occurs in nature as a mineral, niter  It is a source of nitrogen, and nitrogen was named after niter. Potassium nitrate is one of several nitrogen-containing compounds collectively referred to as saltpeter 

Major uses of potassium nitrate are in fertilizers, tree stump removal, rocket propellants and fireworks.