Marion Ferrous Sulfate 31 Fine Granular (50 lb) works to deliver vigorous growth and deep green. Ferrous Sulfate 31 Fine Granular is best used in early spring or late winter. Ferrous Sulfate 31 Fine Granular is industrial grade, and is 12-24 mesh. Ferrous Sulfate 31 should be kept away from pools, ponds, and water features.
Application: fertilizer.
Use on: turfgrass.