Bionova K 20 Potassium Mineral Additive, 20 LiterPotassium 20% Food grade minerals Concentration 1: 2000 NPK 3 0 20 Potassium deficiency agent Bionova K 20 is a food grade mineral fertilizer 20% potassium, Bionova K 20. Plants have a high demand for potassium during the maturation phase. Potassium plays an important role in the osmoses regulation, in the opening and closing of the stomata's, the protein synthesis and the functioning of enzymes. Which results in a higher quality fruit flowers,