Protecting Roots of Mature Trees Horticulture Protecting Roots of Mature Trees Trees are important fixtures in the urban and rural landscape. We value above-ground parts of trees for their spring flowers, cooling shade in summer, and vibrant leaf colors. But healthy root systems below ground are vital for tree vigor and longevity.
Roots are responsible for water and mineral nutrient uptake, energy storage, and anchorage.
If for any reason tree roots are damaged, tree health will be jeopardized. Because roots work quietly out of sight underground, most people have a poor understanding of this important subterranean network. They usually will not grow where there is no oxygen or where the soil is compacted and hard to penetrate. This need for oxygen explains why a majority of tree roots are located in the top 12 to 18 inches of soil. Root systems are also extensive.