Girdling roots, drought, poor growing locations, and other factors aggravate the problem. Prevention Deep waterings are the obvious way to prevent leaf scorch. Check your watering regime, and improve it if needed. Irrigate so that water penetrates deep into the root zone. Short, frequent watering intervals do not produce a deep, strong, root system or good tree health.
Frequent lawn watering only wets the soil to a depth of a few inches.
Use a slow trickle from the garden hose over several hours. Do not let the water collect, it needs to soak in slowly. Mulching, to prevent grass and weed competition for water is also advised. An investigation of the health of the root system of the affected tree or shrub should also be conducted. If a specific cause of poor root health can be determined, then corrective measures should be taken.