The answer to 'why is my patio dying plants' is that there are several common causes, including poor soil quality, inadequate drainage, too much or too little sunlight, and pest infestations. Symptoms can include wilting, yellowing leaves, and stunted growth. To troubleshoot and solve the issue, you'll need to carefully examine the soil, light conditions, and overall health of your plants.
If the problem is due to poor soil or drainage, you may be able to amend the soil or improve the drainage yourself. However, if the issue is related to pests or a more complex environmental factor, it's best to consult a professional landscaper or horticulturist who can diagnose the problem and recommend the appropriate solution.