The answer to 'retaining wall thin grass' is that thin or sparse grass near a retaining wall is a common issue, often caused by factors like soil compaction, lack of sunlight, or improper drainage. This can lead to the grass struggling to grow and thrive in that area.
Some common solutions include aerating the soil, amending it with compost or topsoil, and ensuring proper drainage around the wall. Adjusting mowing height and watering patterns may also help. If the issue persists, it may be best to consult a professional landscaper who can evaluate the specific site conditions and recommend the best course of action.