I have my first fruit on a Constance Elliott. Is this plant self fertile or is it likely a cross with another passionflower?
Constance Eliott (and P. caerulea in general) is usually not self fertile. However, it has been known to occasionally self when foreign pollen is applied. It also may produce hollow fruits in the absence of cross-pollination.
The only other passionflower I have is Incense. We've had lots of bees, butterflies and wasps this year, so I may be in for a nice surprise.