The plants I cut back (as recommended) last fall didn't do well. Only half survived the Chicago Winter.
I planted new this spring from very good nursery. They grew, but not a lot. They didn't fill in as much as I expected. Should I cover them with rose cones? Should I cut them back? (last years cut back was disappointing).
I see them in highway dividers here locally and they seem to thrive, even in winter road salt spray.
So what do I need to do to make my little group flourish next spring?