I live in an area where there's a lot of clay. It's mostly ok because they clay doesn't start until about a foot down. But I have a problem. My front garden (hosta's, lambs ear, silver mound, thrift) if full of little rocks and stones. And it seems no matter how often I pull them all out, after a couple of good rain's, they're back again. I'm wondering if it's actually rocks or hardened clay that's pushing it's way to the surface. I've though about buying some soil (or finding some somewhere) and adding it on top of all the old dirt, but I don't think that's a solution to the problem. So how do I resolve this?? Any ideas?? Thanks!!!