P. laurifolia has been fruiting well for me. While I have 2 mature plants, have got fruits with only 1 plant flowering. Not sure if other passiflora have pollinated it, but think it is self fertile when mature. Hand pollination appears to help a lot.
Laurifolia fruits are very nice, flavor is unique. Fragrant, flowery, and sweet, with some complexity. No sourness or muskiness, like with edulis.
Going back and forth between edulis/flavicarpa and laurifolia is a fun endeavor, and they mix well together.