Help with leaning butterfly bushes
I have three butterfly bushes planted on a berm, alongside a fence. In their second summer, they started leaning south, toward the edge of the raised area, away from the fence which is covered by a grape vine. That year, I built up the dirt in front of them, extended the raised area a bit forward of the direction they were leaning. I also dug out behind them and tried to right them.
Over the winter, they've leaned further and further over (I plan to cut them back to about 18" in the spring) and are now leaning out over the path.
Should I put a stake behind them/tie them back to "train" them to grow straighter, or would you recommend digging them out completely/repositioning them vertically? If so, when should I do that?