Pine straw is an organic mulch that can raise the pH of soil. It is a good mulch for acid-loving plants, such as azaleas and camellias, but may cause the decline of plants that need alkaline conditions.
About this Author
Melody Lee worked as a newspaper reporter, copywriter and editor for 5 years. In addition, she has edited magazine articles and books. Lee holds a degree in landscape design and is a Florida master gardener. She has more than 25 years of gardening experience, which includes working at nurseries and greenhouses.