Garden Sulfur is a valuable amendment that can lower soil pH, help improve soil characteristics, and enhance plant nutrient availability. When dealing with problem soils, such as alkaline or saline soil, it is important to address the conditions that are negatively affecting plant growth. If your hydrangeas, blueberries or evergreens aren’t performing up to expectations, unsuitable soil pH may be the root cause. Alkaline soils (pH > 7.5) can cause nutrient deficiencies which may appear as stunted growth, yellow leaves, or other physical symptoms. Garden Sulfur contains two essential plant nutrients: calcium & sulfur. These nutrients provide numerous benefits and are key to myriad natural chemical and biological processes in soil and plants.