I have one that is totally shaded in early spring and even summer by a 6' fence to the east and a huge spruce to the immediate south. It gets full sun in the later afternoon til nightfall though from late June on. It flowers very little though the bush is certainly healthy. I also don't fertilize. Not sure it would help with the sun problem. Thoughts. I hate the thought of trying to dig it up. It has been there since 2007 so the roots would be huge plus probably mixed with the spruce roots.