It most likely will not become a fruit so up to you if you want to remove the spent bloom, but you probably want the plant to focus on growing roots in the ground so that it can come back next season. I have had atleast a hundred blooms on my vine already but only around 8-10 fruit that I can see. Even hand pollinating does not ensure fruit, unlike my Edulis which every flower I hand pollinate becomes a fruit. I planted a different incarnata next to it so next year it will hopefully cross pollinate for much better fruit yield. In my zone everything above the ground will die starting in late October/early November which is when I cut the vine down and clean up.
thanks for the information, my vine is still potted thought, I bought it in winter and this is its first summer. When I bought it it was sharing a pot with several careuleas, the incarnata one was only roots back then, no aboveground parts...whatever i'm glad it took since I was surching for this plant for quite some time...
Now its still potted since my plan it to be overwintering the original plant in my basement where the chance of freeze ingury is zero, when it get bigger I will root some cuttings and those will be planted in the garden .
Thats an interesting article about the flower parts , whats more interesting to me about it is that my purple edulis ,when it was blooming ,every flower was going trought theese tree stages. The upright stigmas when it opened in the morn, then they leveled with the male pollen parts, then just dessicate the next day.
I also pollinated every flower on my edulis that I could, the result ,almost all of them set fruit, i'm quessing arround 100 fruits on my plant right now.
I have never had a problems with my Passiflora incarnata fruiting, and I only have one large, rambling vine. That being said, its first year, it produced very few flowers and very little fruit. You will probably get more fruit as your vine grows older and becomes more established.
I am deff hoping for a bounty of fruits in the next years ,when the plant gets bigger and stronger...