Exposed tree roots can be a two-fold problem in the lawn – they are unattractive and they are difficult to mow over. In extreme cases, they can even become a tripping hazard. Fortunately, there are a couple of different ways to solve the problem, but first you need to know the cause. The following guide can help.
The Cause
Causes of shallow tree roots vary. Some trees are simply more prone to growing in a lot of surface roots. Maples, willows, and walnut trees are a few examples of such trees. Another cause of exposed tree roots is surface erosion. This usually occurs when the grass is thin or non-existent and there is no other coverage over the soil. Finally, an increase is raised surface roots can also indicate drought stress. Some trees begin sending out more roots to seek water or to take advantage of surface irrigation when there is no available moisture deeper in the soil.
New Turf
When erosion is the cause of root exposure, the answer is to replace the soil and then prevent erosion from occurring again. The simplest way to do this is by laying a new layer of topsoil over the roots and then leveling it. Then, plant sod. As the sod roots, it will prevent future soil loss as well as provide a living mulch over the root system of the tree. You can opt to plant a groundcover instead if you prefer not to mow.
The Mulch Solution
If you have a tree variety that naturally produces lots of surface roots, consider mulching. A thick layer of mulch means you won't have to mow and the mulch will disguise any raised roots. Begin by stripping out any grass beneath the tree. Then, surround the tree with an edging material of choice. Finally, fill in the area between the trunk and the edging with bark mulch. Laying the mulch 3 inches deep to within 3 inches of the trunk works well.
Water Improvements
Water penetration deeply into the soil can be the hardest issue to fix. If you suspect drought stress is the cause of the increase in surface roots, try aerating the soil beneath the tree so that water can penetrate more deeply. Proper irrigation is also important. Water deeply a couple of times a week for about 30 minutes, instead of watering shallowly for just a few minutes every day.
For more help, contact a tree service in your area.
