The answer to 'patio dead trees' is that there are several common causes, including drought, disease, pest infestations, and improper planting or care. Symptoms may include wilting leaves, discoloration, and eventual tree death. Solutions depend on the specific cause, but may involve watering, pruning, treating disease or pests, or replacing the tree entirely.
If the cause is unclear or the tree is large, it's best to call a professional arborist or landscaper to diagnose and treat the issue. They can provide expert advice and services to save the tree or safely remove it if necessary.