This compost has been designed to create the perfect conditions for acid loving plants such as Rhododendrons, Azaleas, Camellias, Berberis, Pieris, Hydrangea, Heathers, Magnolia, Skimmia, and Blueberries. It has an acidic pH of 4.0 that is perfect for calcifuges (acid loving plants) and the lime free formula makes sure that it does not rise to an alkaline level.