The answer to 'retaining wall disease' is that there are several common causes, symptoms, and solutions for retaining wall issues. Retaining wall disease can be caused by factors like poor drainage, soil erosion, freeze-thaw cycles, and improper construction. Symptoms may include cracks, leaning, bulging, or the wall collapsing entirely.
In many cases, minor retaining wall issues can be addressed through DIY repairs like re-grading the soil, improving drainage, or reinforcing the wall. However, more severe structural problems often require the expertise of a professional landscaper or engineer to properly diagnose and fix the underlying cause.