Triple Superphosphate (TSP)
Bunn Fertiliser offers Triple Superphosphate (TSP) containing 46% phosphate, soluble in neutral ammonium citrate and water. Of this, normally 90% is soluble in water alone. This variant of TSP is the highest quality product available. Lower quality versions may contain as little as 40% phosphate and have a water solubility of 75% or lower.