Lady Banks wants to grow BIG. Left to its own devices, it can take over the yard. Theoretically, she could keep it severely cut back, but it would destroy the natural grace and fountain structure of it—the canes want to grow 10, 12+ feet a year. Because it blooms on the previous year's growth, there is a brief window from right after bloom (mid April in my area) to roughly midsummer when it can be cut back without sacrificing next year's bloom. In my experience, trying to keep it within limited bounds is a constant hassle and results in an ugly butchered shrub. It can be lovely in the right space, but it needs a lot of it.