unsure of pruning wording for wisteria
I see that some wisteria blooms on old wood. I have a tree wisteria that I prune many times, sometimes weekly, in the summer because it grows so fast and gets so bushy. At what point does something become old wood? How can you prune a wisteria to keep it under control and still have it bloom? Its so bushy I can't tell what is new growth and what is old growth. It all looks like new growth.