I also thought gravel might be a better groundcover option in some areas because of my above assumption about mulch. Not true! It really doesn't seem to make much of a difference if soil is still all around, and you'd have to dig the gravel down pretty far, like a trench. In hard Georgia clay, that is a LOT of work! He actually mentioned that gravel can big a big pain when it comes to installing termite stations around the perimeter since they have to be dug in (watch the video to see that installation!).