If you're looking for a way to spruce up your backyard, why not spread mulch over the garden beds? Various materials may be on offer, but bark is among the most attractive and useful options. Read on to discover the ways it will enhance your landscape.  Nourishes Soil Over time, bark breaks down, adding beneficial minerals and organic matter to the soil. This process closely mimics a natural bush environment where trees shed bark which decomposes into the surrounding earth.