The answer to 'hedge dying plants' is that there are several common causes, including pests, diseases, environmental stressors, and improper care. Symptoms may include wilting, discoloration, and dieback of the leaves and branches. Solutions can range from pruning, watering, and fertilizing to treating pests or diseases, or even replacing the hedge entirely.
If the issue is caught early, some hedge problems can be addressed through DIY methods. However, for more severe or persistent issues, it's best to consult a professional landscaper or arborist who can properly diagnose the problem and recommend the appropriate treatment.