HY-GEN COCOBLOOM� twin part nutrient is designed to be used when growing in coco peat during the flowering & fruiting stage. HY-GEN COCOBLOOM� in conjunction with HY-GEN COCOGROW� to ensure an optimal transition. HY-GEN COCOGROW� formula contains high quality natural kelp extract and a coco conditioner to ensure optimal root growth, so it�s important to use both growth specific and flower specific nutrient to get outstanding results � It really does take two!