Mid-Atlantic Gardening: I need help picking long-lived plants, 1 by hart

hart wrote:
I really like this Ruby Meideland. It's in the worst, nothing but rocks soil in the yard and so I can promise you it's tough as nails, blooms all summer pretty much constantly although the blooms are small, and never looks messy. It's never gotten prone but that's probably because it is in such awful soil and such an extremely dry spot. It's getting a lot of shade now from the Zelkova and poplar. It's probably about 2 feet tall. It won't get taller, it will just get long enough stems to flop over and be a groundcover.

This photo was taken in May. It had been blooming for a couple of weeks and is still going strong.