Van Iperen Potassium Nitrate Horticultural Grade is a very pure potassium fertilizer that dissolves quickly and completely. Our product is not sensitive to clumping and is recommended during fruit or tuber development. The high potassium level plays an important role in achieving higher yields with optimal quality and affects the overall performance of the plant. In addition, the presence of nitrate nitrogen has a positive effect on the absorption of potassium in the plant and is crucial during fruit sizing.