Hi Dennis Here in Coastal California, Dietes (two or three species) grow freely and easily, but are not weedy. I've just put the seed in a pot of commercial potting mix and voilà! a new seedling. They take a few years to get to blooming size. Now tell me -- I've grown many irids from seed, but never Iris. I just got some Iris seed -- is there anything special I need to know about germinating Iris? David E.