Maxibloom gh1221 is formulated for the flowering phase of plant growth and is designed to enhance robust flowering with enormous gorgeous fragrant blooms Blended with purified water soluble minerals maxibloom includes calcium magnesium and sulfur missing in many common plant foods essential for both plants and people The maxi series is excellent for hydroponics as well as soil gardening Use maxibloom during the bloom phase Specifications . Weight 2 2 lbs