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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. If you add PK 13/14 at the right moment, you will get astonishing results! PK 13/14 is suitable for any growing medium.