Blossom Blood has earned a reputation as a premium floral product. The addition of Blossom Blood to a nutrient reservoir during the flowering stage of a plant will promote fuller buds and flowers. Developed for pH stabilization and floral production in hydroponic applications, Blossom Blood may also be used in soil-less growing mediums. Blossom Blood is a specific type of pH buffer salt. It is not a plant food. It is compatible with all quality nutrients and soil-less growing media. Use no more than 1/4 tsp per 10 gallons, one package treats at least 52 gallons.