Potassium sulphate is an excellent source of potassium nutrition for plants. The potassium portion of the Potassium sulfate is no different from other common potash fertilizers. However, it also supplies a valuable source of sulphur, which protein synthesis and enzyme function require. Like Potassium, Sulphur can also be too deficient for adequate plant growth. Further, Chlorine additions should be avoided in certain soils and crops. In such cases, Potassium sulfate makes a very suitable K source.