Dealing with Tree Roots A tree's extensive root system can lead to occasional problems in the garden. Let’s take a look at three common issues with roots. Tree roots can lead to problems
You might be surprised to know that a tree’s thick anchoring roots can grow one and a half to three times the width of its canopy. And many of the moisture- and nutrient-absorbing feeder roots are in the top 18 to 24 inches of soil. This extensive root system can lead to occasional problems in the garden. Let’s take a look at three common issues.
1. Surface roots can be a hazardLarge roots that show aboveground beyond the normal root flare (the spot where roots begin to grow out of the trunk at soil level) are usually anchoring roots and can be tripping hazards. They can also be damaged by lawn mowers that shave off the exposed wood, leaving the tree vulnerable to insects or diseases and dulling your lawn mower blades.
Trees with shallow root systems, such as maples and white pines, may be more prone to this problem. Freeze/thaw cycles can push roots to the surface, but erosion on a slope or grade changes due to construction or landscaping can also expose roots.
Your first impulse might be to cover the roots with a thick layer of soil, but this can smother small underground feeder roots, preventing them from absorbing moisture and oxygen. A better solution is to spread a 2-inch layer of mulch or compost, which is airier and drier than soil. This discourages new roots from growing there and repeating the problem.
Try planting shallow-rooted ground covers, such as epimedium, wild ginger and lilyturf to disguise surface roots. These plants are able to compete
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