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