Q. Do you have to plant two passionfruit vines together for them to bear fruit?
A. No the flowers of a passionfruit are bisexual, so one grafted vine is all you need.

Q. We have a passionfruit vine with heaps of large fruit which are very sour. How do we make the fruit sweet?
A. Leave the fruit inside for a few days before eating it. Then the flavour goes from sour to sweet.

Q. There are 2 types of leaves on my passionfruit plants. One type is prolific and I think these are called suckers. They don't look like they will bear fruit. Should I prune these off or should I start again?
A. It does sound like you have suckers coming up from the rootstock. If you can trace them back to below the graft union (the knobby bit at soil level) they are suckers and should be cut off. This should encourage the desirable cultivar above the graft union to produce fruit.

Q. Why do flowers fall off a seemingly healthy passionfruit vine? I water it daily and feed it with cow manure about 3 times a year and have just given it some citrus food.
A: Poor pollination and irregular water seems to be frequently the reason for poor fruit set. Getting passionfruit to set fruit successfully is a tricky task. Some references say plenty of food, well-drained soil and lots of water is all you need. Irregular watering (or too much water) may have stressed the plant and caused it to drop its flowers. Fertilising a plant without watering it is enough to stress a plant. If the flower is not fertilised it will fall off anyway – try planting more flowering plants around to attract the bees.

Q. My passionfruit plant has grown really well but now it is 5 years old and starting to look very sad. What should I do?
A. Most plants only last 3 or 4 years then you should plant a new one.