If you want the biggest fruits and flowers, CANNA PK 13/14 is the right product for you. CANNA PK 13/14 is a mixture of top quality nutritional minerals that stimulate flowering. It's easy to use and makes for high yields. PK 13/14 is suitable for any growing medium. Furthermore, it only needs to be applied one week only to the nutrient reservoir. If you do this at the right moment, you will get astonishing results!