It looks like a type of hibiscus. Hardy hibiscus maybe?

I am guessing it's a Rose of Sharon. Our site has a lot of information about them.

Benny is correct, it's a Hardy Hibiscus cultivar. It looks like maybe Hibiscus moscheutos 'Luna Pink Swirl'.

Definitely a hardy hibiscus cultivar. Kind of looks like it could be 'Luna Pink Swirl' like Jay stated, or possibly the 'Disco Belle Pink'. Looks like it is doing quite well up there in zone 4. If you like it, there are quite a few hardy hibiscus that do pretty well up there in that area, such as 'Copper King', which is one of my favorite hardy varieties with it's dark leaves.

Hi Shannon,
I agree, your lovely plant is a Hardy Hibiscus. Here are the two mentioned above:
Hybrid Hardy Hibiscus (Hibiscus Luna™ Pink Swirl)
Hybrid Hardy Hibiscus (Hibiscus 'Disco Belle Pink')

And, if you want to drool over more beauties, check out all the photos of those listed here in our database: http://garden.org/plants/searc...