TurfGro 52974 24-0-11 30% SRN .15% Dim Fertilizer 50 lbs - TurfGro Professional Fertilizers are formulated for your region, soil, turf and plant needs. Slow Release Turf formulas offer the most efficient feeding for lawns and increase the time between applications, saving you labor and maintenance costs. The slow release nitrogen from XCU polymer-coated-sulfur-coated urea provides uniform growth and sustained feeding.