This Sulfur by Rattlesnake Brand™ contains 90% elemental sulfur. Sulfur
is added to lower soil pH. This works best when the sulfur is tilled
into the soil and the soil is moist, aerated, and warm. Air and water
along with naturally occurring soil bacteria break the sulfur down into
sulfuric acid. The sulfuric acid component will increase your soil
acidity. In general 8 ozs. per 100 square feet beginning in March.