PK 13/14 is a blend of edible grade minerals that stimulate flowering. This product was developed for flowering fast growing plants. PK 13/14 it is easy to use and allows you to easily obtain higher yields. The nutrients potassium and phosphorus are essential for plants that are in the flowering period. PK 13/14 is a pure blend of high quality phosphorus-potassium. It is excellently soluble and is therefore directly assimilable by the plant.