These are definitely pacific-rim species, and therefore worthy of discussion. :-) About 3 or 4 years ago I got some starts of Iris koreana and Iris odaesanensis from Joe Pye Weed Garden in Massachusetts. I planted them next to each other against the southwestern corner of my house. Iris koreana has NOT been vigorous, but it has increased a little bit in size over the years. It finally bloomed this year, sending up about half a dozen miniature stalks, each producing 2 flowers. Iris odaesanensis HAS been vigorous and now covers an area approximately 4 square feet. It blooms faithfully each year, and is just now starting to bloom again. I'm expecting around 3 dozen stalks this season. I've posted pictures on the SIGNA web database. The flowers of each species are about an inch across. Possibly good candidates for a rock garden, but I grow mine in a semi-shady woodland type spot with a mulchy humousy type soil. http://www.badbear.com/signa/signa.pl?Iris-koreana http://badbear.com/signa/signa.pl/… This year with my new camera I hope to get even better pics of Iris odaesensis. Dennis in Cincinnati