It's really hard to place rocks on the surface like that and still have a pleasing look. Very good job, Linda!
And see how captivating the whole display is! There is so much to look at. You'll never be bored like with some other garden types.
I don't know if you did this on purpose, but I see a lot of the rocks "used" as divisions between plants. This is forward thinking, because without rocks your sedums will quickly grow into each other and you would have a big mess. With the rocks in between, you can easily tidy up, and rip out the excess.
Sedum sexangulare is a pest for most people. Though we have never planted it, we are constantly weeding it out of our Arboretum's rock garden and can't seem to get rid of it. You see, on the other side and down the walkway (past the rock garden) the Arboretum uses it as an effective ground cover, bordered on all sides by cement.
