If, a year or so later, you find that the soil did.
But, if you are in an area where there's a lot of traffic, the main thing you wanna do is you wanna mulch your tree roots so that you don't trip on them. And in that case, the best thing to do is. Make sure the mulch is at least 5 inches away from the trunk of the tree and no more than 2 to 4 inches deep. Spread the mulch around the tree into the surrounding landscape as wide as you like, tapering out to the ground level at the edge of the ring.
Use fresh natural mulch such as wood chips or bark bushdig.barted Reading Time: 2 mins. Sep 02, Six inches of mulch is too deep. Much of the water that would otherwise reach the tree's roots gets trapped in the mulch.
Excessive mulching can suffocate a tree's roots. Deep mulch can invite rodent pests (such as voles) and diseases. Yes, in fact, mulch is the best way to cover tree roots above ground. When you add 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. Mulch around trees keeps the roots at an ideal temperature.
Temperatures within mulch piles may reach as high as degrees.
Mulch acts as a constant insulator for our tree by keeping the soil warm in winter and cool in summer. Organic, coarser mulch does a better job at this than inorganic or processed mulches, like fabrics or plastics. Swedish University