I live in a condo. There is a section in front of my condo where there are pavers. Like a small patio of pavers bricks. I wanted to remove a few paver bricks and put a butterfly bush there. There is paving sand of unknown type underneath.the pavers and some dirt.. underneath that appears to be clay. Not sure if I will be able to still what I want to do. If i am still able to plant the butterfly bush in there how can I do it successfully? If not what type of pot can I put it in and how large should the pot be so that the bush may survive through the winter.