Can anyone explain to me how deadheading prevents iris from going to seed? I just removed the dried-out spent iris flowers. It seems to me that even if I did not remove those dried-out flowers, they were already dried-out and would drop themselves eventually. Thus, how does this deadheading prevent the iris from going to seed? Is the iris still trying to form seeds while having the dried-out flowers? Perhaps, I did not do it right. Should I remove the spent flowers before they get dried-out. How soon should I deadhead it? How far do i deadhead it? Just the flower part, passing the bumpy part and cut it down to the top stem, or cutting down the stem but above any foliage? Thanks