The nutrients potassium and phosphorus are essential for flowering and fruit setting plants. CANNA PK 13/14 is a quality mixture of potassium and phosphorous compounds. CANNA PK 13/14 dissolves easily in (tap) water and is therefore immediately available. Use CANNA PK 13/14 from the moment the flower bud develops or at the onset of fruits. 15ml CANNA PK 13/14 per 10ml nutrient solution. CANNA only uses high grade nutrients and chelates which are immediately and completely available for the plant.