Something that bloomed wouldn't be bad either.
The soil is high in clay content and compaction, is mostly sunny toward the front of the barn and mostly shady toward the back (north) where the natural drainage flow lies. You don't have to dig down very far to strike tree roots, so stuff that requires deep digging is out as well.
I know lots of my Freeper friends know more about landscaping than I do, so ideas are welcome.
I really like the “walk on me” thyme plants as an alternative ground cover.