>rises. Do you know when is the best time to divide them? >[...] >spring and summer here. Have you tried them in the fall? Sorry I forgot to answer this question. I have not divided my I. odaesanensis yet. They have been happy in the same spot for about 4 years now. I don't want to bother them. They have plenty of room to spread, so I've never had a need to divide them. Dennis in Cincy