Using the right plants on hillsides can help slow and spread runoff and prevent soil erosion. When setting plants on a steep slope, arrange them in staggered rows, if possible. Depending on the type of soil, do your best to make an individual terrace for each plant and create a basin or low spot behind each one to catch water. For slopes that do not require specialized engineering for reinforcement, it is generally considered a good practice for added precaution, to cover the steepest slopes with jute netting through which plants may be installed.