Cultured Solutions? Bloom A & B is a full-spectrum, mineral salt-based nutrient that contains all the elements necessary to produce prolific blooms and fruit. Cultured Solutions? Bloom A & B combines all the macronutrients and micronutrients in their proper proportions, in a pH stable, chelated form that is ideal for high performance water culture applications. Cultured Solutions? Bloom A & B provides the optimal nitrate to ammoniacal nitrogen ratio. This ensures healthy growth without promoting excessive vegetative growth, which can hinder and in many cases deter bud set and maturation in flowering plants.