Why You Shouldn’t Cover Tree Roots with Soil: Understanding the Risks and Alternatives

If you have a tree with exposed roots on your property, you might feel inclined to cover them up with soil. After all, those gnarled roots can detract from the aesthetic appeal of your landscape and may even pose a tripping hazard. However, burying tree roots under a layer of dirt is not only ineffective but can also harm the tree in the long run.

Exposed roots, also known as surface roots, emerge above ground for a reason. Typically, this occurs because the roots are not receiving sufficient oxygen underground. Simply covering them with soil recreates the very problem they were trying to escape. When roots are deprived of oxygen, their cells begin to die, leading to irreversible damage to the tree.

Moreover, covering exposed roots with soil only masks the underlying issue without addressing the root cause (pun intended). If roots are surfacing, it indicates an underlying problem with the soil or the available space for root growth. Merely covering them up with soil fails to resolve these underlying issues and may exacerbate them over time.

Instead of hastily covering exposed roots with soil, consider alternative strategies to address the root cause of the problem:

1. Improve Soil Conditions: Evaluate the quality of the soil surrounding the tree and make amendments as needed to improve aeration and drainage. Incorporating organic matter, such as compost, can enhance soil structure and promote root health.
2. Provide Adequate Space: Ensure that the tree has sufficient space for root growth by minimizing compaction and avoiding construction activities near the tree’s root zone. Creating mulched areas around the tree can help protect roots and improve soil conditions.
3. Implement Root Barriers: In situations where surface roots pose a persistent problem, consider installing root barriers to redirect root growth away from sensitive areas, such as walkways or driveways. Root barriers can be made of various materials, including plastic or metal, and are buried vertically to deter root encroachment.
4. Practice Proper Tree Care: Maintain the health of the tree by practicing good arboricultural techniques, such as proper pruning, watering, and fertilization. A healthy tree is better equipped to withstand environmental stressors, including soil compaction and oxygen deprivation.

By addressing the underlying issues contributing to exposed roots, you can promote the long-term health and vitality of your trees while enhancing the beauty of your landscape. Instead of covering up the problem, take proactive steps to support root health and mitigate potential risks to your trees.