Professor's Flower Boost The Perfect PK Booster! PK booster: Flower Boost is a high grade concentrated PK - (Phosphorus/Potasium) liquid flower enhancer, scientifically formulated to initiate early flowering and node development and provide plants with the perfect ratio of PK to produce a large, high quality yield. Features: Activates Flowering Enzyme production Provides perfect ratios of P and K to boost flower development Faster flower growth and bud onset Larger heavier blooms of higher quality Aids in energy transfer and storage of carbohydrates How do I use Professor's Flower Boost? To achieve maximum yield, Flower Boost should be replaced with Extreme Boost in the final 3 weeks. Hydroponics: Use 2ml Flower Boost per 1L of nutrient solution.Soil: Use 1.5ml Flower Boost per 1L of nutrient solution. What is the difference between Professor's Flower Boost and other PK boosters? Professor's Flower Boost is a high-quality, concentrated PK booster that is scientifically formulated to provide plants with the perfect ratio of P and K to produce a large, high-quality yield. Other PK boosters may not be as concentrated or may not contain the same ratios of P and K. Guaranteed Analysis Available Phosphoric Acid …………………………. 10% Soluble Potash (K20) ………………………………. 8.7%