The answer to 'hedge erosion' is that hedge erosion is a common problem that can be caused by a variety of factors, including heavy rain, wind, and poor soil conditions. Symptoms of hedge erosion include bare spots, exposed roots, and the hedge leaning or falling over. Solutions can include reinforcing the soil, adding mulch, and properly trimming and maintaining the hedge.
In many cases, minor hedge erosion can be addressed through DIY efforts, such as adding soil, mulch, or stabilizing the hedge. However, for more severe erosion or issues with the hedge's structure, it's best to call in a professional landscaper or arborist to assess the problem and recommend the appropriate solution.