Wish?
Wait?
Hope?

Seriously if any of us knew how to increase the flowers on these plants they'd be a very rich individual.

All I can suggest is make sure they're happy- enough water (but not too much!) enough sun (but not too much of that either!) and enough fertilizer.. But guess what.. Don't over-do that either.

I've found these plants bloom when tehy want to. You can stop them blooming by exposing them to cold, as I've done not-on-purpose several times this year because of the strange weather, but there's no magic pill to get them blooming, or to get them to bloom more.

I say give your plants a high phosphorous, water soluble fertilizer. I use Grow-More's 11-54-4's or 10-52-10 fertilizer and I have loads of blossoms on ALL of my Passiflora right now and I am in zone 9 in SoCal. My Lavender Lady looks great and is full sun. I raise Gulf Fritillary butterflies on mine :)

PS: Almost all of your flowering plants will like this water-soluble fertilizer. :)

Here is a link that might be useful: Grow More fertilizer info

Thanks, Krstofer and tdogmom. I think my plants are happy where they are, they bloomed quite a bit during spring, but now are just a 'mess' of lush vines. With most of my plants, I normally just deadhead to get more blooms, but since neither of these Passiion vines form fruit/seeds, there is no point in deadheading. So I was just wondering if maybe I should prune or pinch them. Since I haven't fertilized them much, will try high phosphorus fertilizer as suggested. Thanks again.