Pines (Pinus spp.) are native to most of the northern hemisphere, therefore they can be found nearly everywhere in the U.S. and Canada. They are a major component in many forests and are a valuable source of timber, as well as a beautiful and useful landscape plant. However, pines have extensive root systems that provide support and nutrient storage for the tree, and if soils are shallow and don’t drain well the roots may come to the surface for oxygen. These roots can become problematic if they grow around driveways, foundations or plumbing. Removing them is possible but may weaken, damage or even kill the tree.
Weigh the risks. If you need to cut many roots, you may want to consider removing the tree instead. Never cut more than one fourth of a tree’s roots, because it may compromise the tree’s ability to store food and to provide adequate support, risking the tree’s stability when challenged by high winds or snowfall. Cutting roots also leaves the tree open to disease that may enter the tree through wounds. Consult an arborist if in doubt.
Expose the roots in question by using a shovel to dig under and around them. Dig out about 6 to 12 inches of the root at the point before the root emerges from the ground in addition to the roots that have already emerged. Clear enough space so that you can use a hand saw or chainsaw to cut the root.
Cut the root 6 to 12 inches before the point where it begins emerging from the ground, using a hand saw or chainsaw. Remove the offending root portion. Do not treat with wound paint, as this may prevent the tree from forming a protective callus.
Refill hole with the excavated soil and water thoroughly. Continue watering every day for two weeks.
Evaluate what effect cutting the roots has had on the tree. Watch for signs of instability. If the tree begins to lean, remove it immediately to avoid harm to people, animals or structures. Observe if foliage turns brown or branches die back. Watch for signs of disease. Effects may be immediate or surface over several years.
Things You Will Need
- Hand saw or chainsaw
- Consult a professional to assess the risk of root removal.
- If possible, remove roots over an extended period of time rather than all at once.
- Wear appropriate protective gear when removing roots.
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