The answer to 'why is my retaining wall dead trees' is that the trees near the retaining wall are likely dying due to poor soil conditions, root damage, or other environmental stresses. Retaining walls can disrupt the natural soil and drainage patterns, depriving the trees of the nutrients and water they need to thrive.
Common signs of distress include wilting leaves, stunted growth, and premature fall coloring or leaf drop. If left untreated, the trees may eventually die completely. To resolve the issue, you'll need to address the underlying cause, which could involve adjusting the soil, improving drainage, or even removing and replacing the affected trees.