Monkey PK 14/15 Is a Phosphorus (P) and Potassium (K) supplement. It is designed to stimulate flower production and produce high levels of yield and flavour enhancing PK, when the plant needs it most. A PK boost early in bloom triggers the onset of fruit production, directing photosynthetic energy to shoots tips, creating flowering sites. During the crucial mid-flower point, allowing your plant access to optimum levels of PK can make or break harvest results. Through extensive research and testing we found the ratio PK14/15 is the perfect concentration required for plants to reach their full harvest potential.