What Kills Trees
By Kathleen Cue, Nebraska Extension Horticulture Assistant Educator
Trees in native undisturbed sites live, on average, to be about 150 years old. Downtown trees have a life expectancy of 7-17 years; suburban trees 30-40 years; and rural trees 60-70 years. Why is there such a difference in life expectancy between trees in native sites than those in disturbed sites? Certainly there are acute factors, like hail, herbicide drift and insect infestations that can kill trees but the chronic issues overwhelmingly pre-dispose trees to shortened lifespans.