OMRI Listed. Readily available source of phosphorus. This liquid fertilizer was designed to correct phosphorus deficiencies. It promotes increased vegetable, flower, fruit and seed production, while improving flavor, quality and yields. It helps prevent blossom end rot in tomatoes. Does not attract animals like dry bone meal. Mix 2 to 8 tablespoons per gallon of water and apply with a sprayer or sprinkling can. Gallon.