Delosperma cooperi is one tough plant. I rooted some cuttings for my parents and they bloomed indoors last winter. My dad planted them in a hollow tree. We put it in their yard and made holes up and down the side of the tree. We planted Delosperma cooperi in all of the holes. I can't wait to see it this spring when all of these start blooming. We made it look like the tree was growing in their yard. LOL.