HY-GEN HYDRO BLOOM is a flowering and fruiting stage specific nutrient. The Hydro Bloom formula incorporates higher levels of phosphorous, potassium and trace elements to support the transition from growth to flowering and eventual final harvest. As flowering is initiated, flowers and fruit formation will require higher levels of phosphorous, potassium and trace elements. Continue using Hydro Growth until there are visible signs of flowers and buds. Start using Hydro Bloom in conjunction with Hydro Growth to ensure an optimal transition.