I just googled the botanical name & just one site had so many positive comments I haven't quit reading yet. You should start there. http://davesgarden.com/guides/pf/go/893/

I have it growing also & it is so beautiful & fragrant, but you better have a large trellis or space for it. It will crawl all over if it doesn't have something to climb on. I think most times the seeds will reseed themselves, but maybe in your area you should save some to replant just in case. I don't know about being related to sweet potatoes, but it is related to morning glories.

Thanks dee2000. Come this fall, I'll see how big the roots are and see if i can save them. I'll probablly store them like other rhisomes and bulbs and see how it works out.