Humboldt County's Own Crystal Burst 2.5 GalBLOOM BOOSTER CONCENTRATE One of the most concentrated liquid PK bloom boosters on the market Increases the size and mass of flowers. Initiates and stimulates profuse flower development. Stimulates resinous oils and fragrance production in many culinary and medicinal herbs. Works well with all nutrient brands. With so many bloom boosters on the market, choosing one can be a challenge. Here are the facts: All bloom boosters are made from Potassium