Ground cover under trees?
I have very large oak trees in my backyard. It is almost completely shaded. But lets in enough sun for weeds and some grass to grow, here and there. Just enough to be aggravating.
It has a lot of large rocks, so mowing it is very rough on the mower and me. I know that if I left the leaves on the ground they would smother the undergrowth. Very unsightly, and it would also be a fire hazard.