We have a Passiflora(looks to be P. caerulea) vine growing outside and it is not very big. I'm wondering if it is possible to do a stem cutting off of it. Also, how well do they do on windowsills(hinting at cuttings eventual destination). Not sure what species but it is a common one. Also, is it normal for the flowers to last a very short time? How do you pollinate them? Do you need 2 different plants to get "fruit"?