Elite 91 Flowers Professional Bloom Additive, 500 mLElite 91 FLOWERS is formulated and engineered using cutting edge Phosphite Technology. In contrast to phosphate, the unique molecular structure of phosphite is readily and easily absorbed by the roots and leaves of the plant, allowing for instant uptake of potassium and phosphorous. Research and trials have proven that phosphites increase flowering sites, crop yield, and fruit size while boosting plant immune systems. Available size: 250 mL 500 mL 1