They generally don't flower til they get quite long. Mine were first planted up against palm trees and soon disappeared about 10 metres up. One got dislodged by a falling palm frond and hung right back near ground level. It had flowers on it. I don't have the natural pollinator here but I didn't worry about manual pollination. Because pieces of vine break off now and then, I've always got pieces to place around other parts of the garden. One I put against a 3 metre tall tree stump. It flowered last year and I could see the flowers from ground level. Needed a ladder to get a photo though. Maybe I'll try to hand pollinate one day when I get time but they're an interesting plant regardless.
This is one heading up into a palm.
