What I'm wondering now is which of these sedum are the super hardy type I can just put outside this winter and which are the ones I might be better off growing under lights. I'm planning on getting a couple tons of pea gravel dumped in my driveway to add to my raised beds and also for my back yard pathways and think most of them wil fit there. My back is hurting just thinking about it, but at least it's a longer term solution than the wood mulch paths I've been dealing with. My front paths are peagravel already and the sedum really seem to like to grow out into them.