Botanicare Pure Blend Pro Hydro Combo Kit: Grow and Bloom (1 Quart) 1 Quart (32 Oz.) each of Pure Blend Pro Grow and Bloom Pure Blend Pro is a hydro-organic vegetative and fruit and flower formula which is a specialty custom blend of organic and natural sources. Use Pure Blend Pro Grow during the structural and vegetative stage. Use Pure Blend Pro Bloom during the flowering and fruit stage of hydroponic gardens. NPK: Grow (2-3-4), Bloom (2-3-5)