I basically use no insecticides, Hetty. I have lots of moths, butterflies, bees, and (unfortunately) wasps around. I just assumed I never had seed pods because of my long dormant period. Of course, I do keep my plumeria (standards) cut back so that I can get them inside in the fall. Perhaps that's the reason. For the first time I have a couple of compact growers, so perhaps........... I really don't know why I have never had one.
