|My scree bed|
I had the least die-off in this bed than anywhere in my garden. Plants here are in their zone and their environmental niche. It features a lot of low sedums, a couple geraniums, catmint, sempervivrens, lavender (which did die to the ground, but is surprisingly coming back from the roots this year), and dianthus. My deutzia (which is a low spreader) even shows remarkable zone tolerance in this bed.
I did work some compost into this bed when I first planted it. It is mulched with pea gravel and edge with rock, which adds to its xeriscaped appeal.