Leaf Scorch

The hot and dry weather has led to some damage on the tender new tree and shrub leaves around the county. This issue is called leaf scorch. Scorch is not a fungal disease but rather a physiological problem associated with damaged roots, limited soil area, or hot, dry winds. Moisture is lost so quickly from the leaves that the roots can't absorb and transfer water quickly enough to replace what is lost causing the leaves furthest from the roots start to burn around the edges. Though scorch is usually associated with droughty periods, it can appear even when the soil is moist. Newly planted trees or those who have small root systems are especially susceptible.

Leaf scorch typically starts as leaf spots or burns along the margin of the leaf and may spread further into the leaf around the main leaf veins. Some trees such as maples, aspens or young oaks are especially susceptible but the condition can appear on any type of tree including evergreens. The issue is often caused by an inadequate root system that is either underdeveloped or damaged by overwatering. Leaf scorch can also be caused by too much fertilizer being applied. Once leaf scorch appears there is no cure and the leaves will likely have the brown spots till they drop. While the leaves will not turn green again you can help the tree recover with proper water management.

Have questions? Contact our office where our Horticulture Extension Agent will assist you with questions.

Phone: (316) 321-9660

Email: callae@ksu.edu