Using Ammonium Sulfate for Lawns as Fertilizer | Lawn …
Add 1 lb of ammonium sulfate to 5 gallons of water in a tank sprayer. Wait for about 3 minutes for the crystals to dissolve entirely in the water. Apply the fertilizer solution at a rate of 1 lb per 1000 sq. ft. of lawn then water the area for about 10-15 minutes to prevent the grass from burning.