It is a concentrated formulation containing a carefully balanced and integrated blend of pure phosphorous and potassium elements for superior flowering results. This unique combination of elements can be called a super-bloomer that develops heavier, larger, sweeter crops extremely quickly. PK 13-14 has been proven by professional growers worldwide . Unlike substandard potash products, PK 13-14 has a guaranteed composition of 13% P205 and 14% K20. PK 13-14 is totally unique, absolutely safe, easy to use and incredibly effective. PK 13-14 is not a nutrient. It is a nutrient additive.