Wish I was still in the North Wilmington, De/ Pennsylvania area because I lived there, I headed to Styer's nurseries every spring to pick out plants. It was just a treat to go there and the employees were very helpful. It is worth checking out, it is fun to go to gardening centers, but this place is definitely one of the best... you have to go to see how unique it is. I am still trying to find a place that compares in MA.....
Pros: awesome selection of perrenials and annuals
Cons: Can't think of any