Several people have written in to ask whether they can will in the area around trees that have lots of surface roots. They either want recommendations for ground covers or they're thinking of adding soil or mulch. Not all tree roots will protrude above the surface, but those that do are coming up for a reason - they need oxygen. So covering the roots is seldom a wise thing to do. Either the tree suffers or your patience will, as the roots will continue to try and come up for air. Steve Nix, About.com's Guide to Forestry, has some tips for dealing with surface tree roots, but for the most part, you're going to have to learn to work around them.
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