CANNA PK 13/14 BLOOM BOOSTER 5LCANNA PK 13 14 is a mixture of top quality nutritional minerals that stimulate flowering. This product has been developed for the flowering phase of fast growing plants. PK 13 14 is easy to use and high yields are easily achieved. Pure elements to stimulate flowering PK 13 14 is a high grade mixture of phosphorus and potassium that is added during the flowering phase. Both elements play a big role during the flowering phase of fast growing plants.