I have been reading about the above---all good ideas. Sorry to not have been able to help at all. Now I just remember what could be a nice addition. I went with the Falls Church Garden Club to the Meadowlark Botanical Gardens a few years ago. The garden has an area for succulents. What I think is different and beautiful is that many of them are planted in pots that are buried into the ground only the rims of the tops showing. It can be made as a border, maybe in the corners, so people will not step on the corners of the plot. I have very limited hens and chicks, but I can get some if you all think it is a good idea. Or surrounding the marker, so no overgrown plants cannot cover the marker. ----Just an idea. I will not be able to help at all until the fall swap-----