Jack's Professional 9-45-15 Plant Starter Water Soluble Fertilizer, 25 lbs.Initial use of 9 45 15 when transplanting into cells or beds supplies the high phosphorus ratio designed to boost root growth prior to shoots. Can also be used to correct or supplement low phosphorus situations, especially in outdoor production. For Use On: Field grown vegetables Jacks Professional 9 45 15 Plant Starter Water Soluble Fertilizer Guaranteed Analysis Total Nitrogen (N) 9% 9% Ammoniacal Nitrogen Available Phosphate (P205). 45% Soluble