As temperatures rise, trees need water to stay healthy. Many mature native trees are able to survive periods of drought, but most will benefit from some supplemental water after 4 to 5 weeks without rain. Longtime Consulting Arborist Don Gardner has developed a series of watering guidelines to help you determine how much and how often to water your trees.
In September 2011, the Texas Forest Service and the Texas Chaper of the International Society of Arboriculture joined forces to publish watering instructions and an informative video. View them at ISA Texas Tree Care Information for Consumers.
It's normal for many trees to drop some leaves during extreme heat. If leaves start raining down from your oak, though, it could be oak wilt. Call an Oak Wilt Qualified Arborist to schedule an inspection.