Growers have been asking Advanced Nutrients about concentrated bloom products with high percentages of phosphorus and potassium (P-K). After testing a 13-14 ratio on real plants to see if it was ideal for producing large, healthy flowers and fruits they determined that wasn't. Their scientists put together Hammerhead- a one-part floral boosters that outproduces nutrients PK 13-14 and other similar ratios. Hammerhead's 2:1 ratio (P-K 9-18) Its 9-18 ratio gives plants the exact amount of potassium and phosphorus that they need without root burn and binding. It's kinder to roots and safer to use, try it today and see how HammerHead puts the bite on other bloomers. Guaranteed Analysis: Available Phosphate - 9.0% Soluble Potash - 18.0% Derived From: Mono Potassium Phosphate and Sulphate of Potash.