The answer to 'why is my patio dead trees' is that there are several common causes for dead trees on a patio, including improper planting, lack of water, pest infestations, or root damage. The symptoms may include wilting, yellowing leaves, and bare branches. To fix the problem, you'll need to identify the root cause and take appropriate action, which may involve watering, pruning, pest control, or even replanting the trees.
If the issue is due to poor planting or ongoing care, you may be able to revive the trees with some DIY maintenance. However, if the problem is more severe, such as root damage or a pest infestation, it's best to call in a professional landscaper who can properly diagnose and treat the issue to save the trees.