i have a chinola plantation with about 8 lines of plants. We had one first bumper harvest and are starting to get the second now. Did you know that you can artificially assist the cross polination by manually passing the pollen from one flower to another? Also the name Passion Fruit as it is known in English comes from the Spanish conquistadoeres who used the cross shaped leaves to expeess the passion of Christ. Try to select the larger fruit variety for seeds to make your venture more fruitful and spray regularly with 20-20-20 fertilizer thats usually bright blue.
I can just see mi esposa rolling her eyes at me when I use a paint brush to dab pollen from flower to flower. She gave me quite a look when she caught me pinching back the tendrils to get new shoots, but now we have over twenty new vines growing..