CANNA PK 13/14; The final step to the top. Phosphorus and potassium are important elements during the flowering phase of plants. CANNA PK 13/14 is a mixture of top quality nutritional minerals that stimulate the flowering of a plant. Phosphorous strengthens cell formation in flowers and Potassium ensures that the plant can produce enough sugars during flowering. Do you want bigger fruits and flowers? Use CANNA PK13/14.