Exposed roots also are unsightly in an otherwise well-manicured lawn. There are a couple of options to cover the exposed roots, but the roots must be near the soil surface to receive oxygen and water. Covering them with several inches of plants or too much soil can kill the tree.Click to see full answer. Likewise, can you put mulch over exposed tree roots?Yes, in fact, mulch is the best way to cover tree roots above ground. When you add 2-3 inches of organic mulch, you get double the benefits. It gives your landscape a clean look and moisturizes and protects the roots. You can sub in gravel as a low-maintenance alternative to mulch.Additionally, are exposed tree roots a problem? Exposed roots aren’t just a dangerous tripping hazard; they can spell danger for the trees they support. Take steps to protect mature trees by protecting their roots with good cover and insulation and then stay clear so you don’t create problems by your well intentioned attention. Keeping this in consideration, what causes tree roots to come above ground? A: There are several reasons tree roots come up to the surface. Heavy clay or compacted soils lack the air and moisture necessary for proper root growth below ground, so roots are forced to come up to the surface to find what they need for survival.How long can plant roots be exposed?Depending on the variety, seedling should remain in the seedling trays from three to six months before transplanting to individual flowerpots. The roots should be exposed only as long as it takes to move the seedling from the seedling tray to a new flowerpot.