The answer to 'why is my retaining wall overgrown' is that overgrowth on retaining walls is a common issue caused by lack of regular maintenance. Weeds, vines, and other vegetation can take root in the crevices and gaps of the wall, causing structural damage and an unsightly appearance.
Some common symptoms of an overgrown retaining wall include plants growing out of the wall, the wall becoming obscured by foliage, and potential cracks or shifting in the wall itself. To solve this problem, regular weeding, trimming, and clearing of the wall is required. Homeowners can often handle basic maintenance themselves, but for more extensive overgrowth or structural issues, it's best to call in a professional landscaping or masonry contractor.