The answer to 'landscape design turning brown' is that there are several common causes, including drought, pests, disease, or improper soil conditions. The symptoms may include wilting, discoloration, and dead or dying plants. Solutions can include adjusting watering schedules, treating for pests or disease, improving soil quality, or replacing affected plants.
In many cases, minor issues can be addressed through DIY methods like adjusting irrigation, applying fertilizers, or treating pests. However, more serious problems like disease, soil imbalances, or extensive plant damage may require the expertise of a professional landscaper to properly diagnose and resolve the issue.