We have this bush growing right by our fence that we have no idea what it is, and would like to know before we dig and move or else destroy, depending on what it is. It measures about 4 feet high and just as wide. We haven't seen any sign of flowering yet at this point. We are in zone 6, and this obviously made it through a tough winter, so seems to be quite hardy. I am attaching 3 photos. Any help will be appreciated.