From: Thomas Jaszewski
A reminder for those of us who appreciate a tree-lined city. The drought last year produced a significant amount of drought stress in Winona’s street trees.
Please, wherever possible and affordable, consider additional watering in lawn and planter areas where the trees’ roots are growing and harvesting water. Do not “deep water” with the rods or devices sold to put water deeper than 8 inches into the root mass. Most of the roots responsible for water and nutrient uptake are in the top 12 inches of soil. Deeper watering is just wasted water. Watering trees at their base is also futile. Because of the conditions, the emerald ash borer has the advantage this summer. This was probably the worst possible news for our ash trees.