Elemental Sulfur 90%. Lowers pH in Alkaline soils. No oil coating so it is more water soluble. A good economical choice to lower pH because of it's ability to make significant shifts in soil pH and for the longevity of that shift. Requires moisture and proper temperature (above 55 degrees), Incorporate into the soil. 3 blueberry bushes require approximately 50 sq. ft. 2 lbs of sulfur is needed to lower pH from 7.0 to 5.5 Pelletized for ease in handling.