It does look very impressive covered with huge seed heads, it would be a shame to cut them off before they flowered. I am planning to leave them over winter for the birds to feed on.
Once the seeds are gone and I cut it down I am going to use the hollow stems to make solitary bee houses. These are just bundles of hollow stems of about eight inches long tied with string and hung around the garden in sunny sheltered places. I suppose they will provide shelter for all sorts of insects, not just the bees.
