Lynn - Have you tried planting the ones that rot easily in a pot and tilting it sideways? I saw this picture of a Delosperma "Fire Spinner" growing in a plate tilted like this. Here is the photo that made me think of this. I made my mom a tower of pots by putting a pole in the ground and stacking the pots up on top of each other. They are all tilted at an angle. Her Sempervivums grow in them perfectly. I just told her not to ever touch them or water them. Now she grows them fine. It's like the photo at the bottom. I used plastic pots so mine wouldn't crack in the winter; however, they did bend slightly. I guess there is no perfect solution to anything. LOL.
