Why Tree Leaves Turn Brown in Summer: Understanding Leaf Scorch

Leaf scorch occurs when a tree loses water faster than roots can absorb it—common during drought with high heat and drying winds. Tender leaf margins brown first; entire leaves may brown if conditions persist. Maples, red oaks, and flowering dogwoods are most susceptible.

Trees with limited root systems are especially vulnerable: recent transplants, trees with roots severed by digging, or roots covered by impervious surfaces (asphalt, concrete). Prevention focuses on adequate watering and root protection.