Sorry Rose, I think you misunderstood. I did use the term flower head, but I neglected to say "after they're done blooming". The bees and butterflies are always around my hosta. My Lancifolia are coming in to bloom now. As I have several large areas of it, the bees are starting to stop by more often.
Betsy, even once the foliage is gone, the roots will continue to develop until the ground freezes.