Peat Moss holds several times its weight in moisture, and releases the moisture to the plant roots as needed. It is typically acidic and will effect your PH. This can be added also for plants that want a more acid soil such as Evergreens and many deciduous trees including willow, oak, dogwood, and magnolias all prefer acidic soil. A few popular acid-loving plants include azaleas, rhododendrons, hydrangeas, daffodils, blueberries.
