Humboldt County's Own Sonic Bloom, 5 lb.Humboldt Countys Own Sonic Bloom is Powdered Sunshine With Vitamin B and More! Humboldt Countys Own Sonic Bloom is the most Concentrated PK Booster on the market that works with all nutrient brands! 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