hi, CS. Welcome to the Midatlantic Gardening forum!
What's the light and moisture like on the slope?
I found this article on native groundcovers in Pennsylvania, in case it is useful.
http://extension.psu.edu/plant....
I've been trying a lot of different groundcovers in my own yard--mostly because I can't make up my mind what I like best!
I find that small sedums work really well for sunnier, drier areas, as does moss phlox. Creeping jenny is also good for sunny areas, as is creeping speedwell. Bugleweed does well in part sun, as does sweet woodruff, which spreads pretty quickly. I have Sedum sarmentosum planted on a sloping, difficult to reach area that gets afternoon sun, and I like it there.
For shadier areas, I've planted several natives, including golden groundsel, mayapple, bloodroot, Chrysogonum virginianum (Golden Star), and allegheny spurge. These colonize more slowly.
Let us know what you go with!
