Interesting. Are you cross-pollinating them when possible? A lot of passion flowers are self sterile and need to be pollinated by another variety. You can harvest pollen and store it dry in a fridge, away from fruit, for a couple of weeks if the timing between two varieties isn't ideal.

I bet a quick search will show which ones are self sterile and which ones are good cross pollinators. Hopefully some other folks with lots of fruit will chime in too.

Let us know what you do and how it works out!
Grant

Its an Edulis, should be self pollinating, one fruit pollinated.

Today, I had 2 flowers, I distributed a ton of of pollen on the pistils, we will see. I think the lack of humidity is not helping.