Cutting tree roots can be risky and potentially harmful to the tree, but it is possible to do so without killing the tree if certain precautions are taken. Trees depend on their roots for water and nutrient uptake, structural support, and storage of energy reserves. Therefore, damaging significant portions of the root system can lead to stress, decline in health, or even death of the tree.
Here are some guidelines to consider if you need to cut tree roots…
1. Assess the Necessity
- Evaluate the Need – Determine why the roots need to be cut. If they are causing damage to foundations, sidewalks, or underground utilities, see if alternative solutions exist that do not involve cutting the roots.
2. Limit the Impact
- Cut Only Small Roots – As a general rule, try to cut roots that are less than 2 inches (5 cm) in diameter. Smaller roots are more numerous and less critical to the tree’s overall health and stability.
- Avoid Cutting Close to the Trunk – Do not cut roots too close to the trunk. Cutting major roots near the trunk can significantly harm the tree. A safe distance is typically recommended to be at least three times the diameter of the trunk measured from the trunk’s base.
3. Timing
- Consider the Timing – The best time to cut tree roots is during the dormant season for the tree, usually late fall through early spring. This timing reduces stress and gives the tree time to recover before the growing season.
4. Proper Techniques
- Use Sharp Tools – Make clean cuts with sharp tools to reduce damage and aid in healing. Jagged or torn roots are more susceptible to disease and decay.
- Minimize Number of Cuts – Try to accomplish your goal with as few cuts as possible to minimize stress on the tree.
5. Aftercare
- Water and Mulch – Provide the tree with extra care after cutting roots. Water the tree regularly, especially during dry periods, to help reduce stress. Applying mulch around the tree (but not against the trunk) can help maintain soil moisture and temperature.
- Monitor for Stress – Watch the tree for signs of stress in the months and years following root cutting, such as leaf wilting, yellowing, reduced growth, or branch dieback.
6. Consult a Professional
- Seek Expert Advice – Before cutting significant roots or if you have any doubts about the process, consult with a certified arborist. A professional can assess the situation, recommend the best course of action, and may even perform the task with minimal risk to the tree.
In conclusion, while it’s possible to cut tree roots without killing the tree, careful consideration, planning, and execution are crucial to minimize harm. Always weigh the necessity and potential consequences before proceeding with cutting tree roots.
