Blossom Blaster™ is a powerful blend of phosphorous and potassium fertilizers. Use Blossom Blaster™ to add size to your blossoms by adding it to your nutrient solution just before flowers are starting to form. It supplies the plant with a reliable source of nutrition in the area where blossoms are developing. Blossom Blaster™ gives high performance in all mediums. Use only 2x during flowering cycle. Use only with change of nutrient. 20 gm is sold in increments of 15 only.