The answer to 'why is my tree bare spots' is that there are several common causes, including disease, pests, environmental stress, or improper pruning. Bare spots on a tree can be a sign of an underlying issue that needs to be addressed.
Some common symptoms of bare spots on a tree include thinning foliage, discolored leaves, and dying branches. The causes can range from fungal diseases like anthracnose or leaf scorch, to insect infestations like aphids or borers, to environmental factors like drought, frost damage, or poor soil conditions. Improper pruning techniques can also lead to bare spots by removing too much foliage.