Try this, and when you search try using "Lady Margaret" Passiflora just like it is written, I found lots on it. Good luck, it sound beautiful!

Here is a link that might be useful: Lady Margaret

Don't trim or prune it- just get something like a small tomato cage (it's what I do) and as the vine(s) grow, simply wrap it around the cage. Then it stays compact & doesn't crawl everywhere.

You don't need to worry about pinching the flowers off either- if not polinated they'll fall off by themselves, and pinching them won't cause the plant to grow any more anyway.

I feed all of mine miracle grow every time I water- in one of those "end of the hose" things? Ya that. Your leaves *should* green up, but some of them are just more yellow than others. My margaret is growing right next to a caerulea constance elliot, (who absolutely REFUSES to bloom.. Sigh) and margaret's leaves look all pale & sickly in comparison, but they're getting exactly the same food & water. So I wouldn't worry too terrible much, but do give her some fertilizer just in case.

Alright I will feed her a bit of miracle grow probably 15-30-10?

Thanks for all the help, best of luck with your caerulea constance elliot!! I hope she blooms for you!