Use True Berry Food for abundant organic fruits on berry plants that thrive in a low pH soil, and other acid-loving plants. Sulfur to help lower soil pH and improve availability of micronutrients, in an exclusive blend of proven farm-grade ingredients for plants and soil, including seabird Guano shrimp and Crab Shell meal. For in-ground and container plants. Apply monthly during the growing season. 4lb bag covers up to 58 sq ft.