The answer to 'retaining wall not growing' is that there are several common reasons why a retaining wall may not be growing plants as expected. This can be due to poor soil preparation, inadequate sunlight, improper plant selection, or issues with the wall's construction. Symptoms may include bare patches, stunted growth, or plants that fail to thrive.
To troubleshoot, first check the soil quality and ensure it has been properly amended with compost or other organic matter to provide the necessary nutrients. Make sure the plants are receiving enough sunlight, as many species require at least 6 hours of direct sun per day. Review the plant selection to ensure it is appropriate for the site's conditions, such as sun exposure, soil type, and climate. Finally, inspect the retaining wall itself for any structural issues that could be impacting plant growth, such as poor drainage or damage to the wall.