SUPERPHOS is a liquid drip phosphorus fertilizer supplying nitrogen, sulfur in addition to phosphate phosphorus. This mixture can supply your crop’s complete phosphorus needs in a single application, early in the season. SUPERPHOS contains both orthophosphate and carbon-protected phosphate to provide readily-available, and controlled-release phosphorus with minimal danger of tie-up in the soil. With a lower nutrient concentration in a more powerful formula, resulting in increased efficiency and maximum uptake.