Bonide Aluminum Sulfate is specially made to help acid loving plants grow better by lowering PH levels and making soil more acidic. When used as a supplement to a regular feeding program alkaline soil conditions can be corrected in order to provide your plants the very best growing environment. Soil Amending Guaranteed Analysis: 100% Aluminum Sulfate (Al2(SO4)3) Aluminum (AL2O3) 17% Sulfur (S) 15% Due to changes in shipping regulations, we cannot ship this item to California.