Espoma Organic 6 Lb. 50 Sq. Ft. Coverage Iron & Soil Acidifier

Organic, all natural soil acidifier. Turns hydrangeas blue. Lowers the pH of soils and allows acid loving plants to achieve optimum growth. Long-lasting and highly effective. Safe, nontoxic, and safer than aluminum sulfate. Can be used for organic gardening. USDA (United States Department of Agriculture) Certified Organic.