Ultimate PK is an additive designed for blooming or flowering plants. Improves the cell structure of the plant and makes the taste and aroma of the fruits full, powerful and top-class. C4 is an advanced bloom stimulator designed to assist the plants’ delivery of carbohydrates, macro and micronutrients, and trace minerals to developing flowers and facilitate the triggering and maturation of complex essential oils appropriate for the early and mid stages of flower development. Ultimate PK is a unique Phosphite based bloom stimulant formulated for the last weeks of flower development. Phosphite is an extremely bioavailable form of Phosphate that promotes healthy root systems and helps insure proper nutrient intake and plant health late in the bloom cycle. Ultimate PK is specially designed to act as a hardener, bulker, and ripener to push your production to the limit. Ultimate PK is responsible for: Larger and harder fruit and flowers with the best possible aroma and flavour