Urban wild, but experience is that most will play well together - however in your zone I think some from your list will die back each winter and return in spring, which you may not want since it will look dead, and you might forget that it isn't (if you're like me you will forget it isn't dead
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I did this last year and it is really exciting to see how well they do with each other! I left space for the perennials and didn't plant right up against them. However I think if you are seeding the bed with both sedum and perennials, they'll be fine and a good choice!
