The answer to 'shrub brown patches' is that they are a common problem caused by a variety of factors, including disease, pests, environmental stress, and improper care. The symptoms typically include discolored, wilting, or dead leaves and branches on the affected shrub.
Some common causes of shrub brown patches include fungal diseases like leaf scorch or root rot, insect infestations, drought stress, winter damage, or nutrient deficiencies. In many cases, the issue can be resolved through proper watering, fertilization, pruning, or treatment of the underlying problem. However, if the issue persists or worsens, it's best to consult a professional landscaper or arborist to diagnose and address the problem.