I've never gotten any fruit from my passion vines either, the gulf fritillary caterpillars usually eat everything above ground in late summer (which is why I planted some originally anyway.) It struggles to come back each year, a few sprigs. I had no idea the fruit could form so early in the year, it was cool to see that. They were growing along a piece of pavement that only exists so maintenance vehicles can get to a bridge, a spot that's mowed occasionally. There was a pretty large patch of it & I figured it would be OK to take a few cuttings, pieces that were going out of the grass and onto the pavement, where they would be likely to get run over &/or mowed soon. Hopefully it will get going more on our fence.