Humboldt County's Own Sonic Bloom W/Vits 5LBPOWDERED SUNSHINE WITH VITAMIN B1 and MORE! Most Concentrated PK Booster on the market! 20 times the vitamin B1 of other popular bloom boosters Increases the size and mass of flowers. Stimulates resinous oil and fragrance production in many flowers and medicinal herbs. NO Dyes! During the flowering cycle plants require large amounts of Phosphorus and Potassium for maximum development. The primary ingredient in Sonic Bloom, Potassium Phosphate