This cherry tree, its the tree behind the park bench, is in need of some serious something. We want to prune it severely if we can and get it to grow more branches further down on the tree and maybe just remove the one left side long branch. This tree was like this when we moved in and we are still not sure what all we can do to rejuvenate it and I don't have a lot of experience with cherries and am not sure what time of year is best to prune it.

Please our tree appreciates any help it can get