I've been growing both from seed for the last few years. They are easy to grow from seed and they grow like a weed. I typically plant these in the second week of April with the plan to repot them outside sometime after May 15th (in Chicago). Be sure to "score" the outer seed casing and then soak them in water overnight (use a fingernail clipper to just notch the seed). If you plant them too early they will inter-twine and you'll spend a lot of time untwisting them. In mu opinion the Cardinal Climber is going to be vey similar to the Cypress vine. You could just go with one if you want to save some effort. Good luck.

Hi everyone, thanks for responding to this post. I sent you all emails. Still looking for Cypress Vine if anyone has any. Also, if you don't have any flowering vines but are interested in my seeds, you can send me postage/SASBE and I'm happy to send them right along.

Hello I would like to do a sase for some of your morning glory and cypress vine Thank you Mildred

dunno if this will clarify or not from my non-scientific viewpoint, but here goes. i had i. pennata for several yrs. then, after i got too vigorous in weeding that out, i found a source of seeds for i. quamoclit, which i'd seen and wanted really bad. anyhow, it seems more seedy/weedy than pennata, and comes up all over(no hope of weeding it all out)- but always with the extremely fine ferny foliage. i have some regular ipomeas(blue heaven, saucers, granpa otts, etc.- those are multifidas) that bloom at the same time and all over each yr, but have never seen them cross with or noticed any recognisable crosses of them and quamoclit(or pennata when i grew it). the common multifida ones cross every which way but loose with each other, but at least for me they haven't boogied with quamoclit. pup- i understood your question, but don't know the answer. it makes sense that it would be part of the genetic grab bag, but i haven't seen evidence of it. maybe your yard/experience is just that. i didn't mean that species don't or can't cross earlier, just that if the seeds are pure species, they should come true. we count on seedsman to label things correctly and breed them true. there's no way to really tell, though, just by the seeds(or plants), but i hadn't seen those 2 buggers cross or spontaneously mutate. however, because the common names are so similar, they certainly could get mixed up in a seed packet. and, who's to say some birds or storms didn't help along with some seeds from neighbor's yards? anyhow, i probably was making too many assumptions & should have kept my lip buttoned. i hope i didn't hurt any feelings. and, that's a good ? about what you call a species that can't cross. anyone?