The answer to 'shrub dead trees' is that there are several common causes for shrubs or trees dying, including disease, pests, environmental stress, and improper care. Symptoms may include wilting, discolored leaves, dieback of branches, and the plant eventually dying completely.
Common causes include fungal diseases, insect infestations, drought, frost damage, nutrient deficiencies, and improper planting or pruning. In many cases, early detection and proper treatment can save the plant, but if the issue is severe, the shrub or tree may need to be removed and replaced.