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My passionfruit that I purchased from Bunnings has grown like mad and flowers profusely, however the flowers just fall to the ground and it doesn't produce any fruit, does anyone know why this would occur?
Welcome to the Bunnings Workshop community @Meloncat. It's wonderful to have you join us, and many thanks for your question about passion fruit vines.
How much fertiliser have you been giving it? Too much can cause the flowers to drop. You'll just need to fertilise early spring with Yates 1.5kg Thrive Natural Citrus And Fruit Organic Based Pelletised Plant Food and then hold off until late summer/autumn. The abundance of lush green growth tells me that most of the plant's energy is likely going into the growth of green material and not into fruit production.
How often do you water, and have you applied a mulch around the plant's base? Passion fruit vines don't like their soil to dry out completely, and mulch will assist with this. They also don't like wet feet, so don't over-water.
Do you happen to know the variety and if it is self-fertile? Some varieties require a second plant to cross-pollinate with.
See many ants on the vine? Ants can cause flowers not to set and, unfortunately, like to make passion fruit vines their home.
Many bees in your backyard? If you lack native pollinators, you can try doing so by hand with a paintbrush. Simply go around to all the flowers and twist the paintbrush in their centre. This collects pollen from the stamens and distributes it to the pistils of other flowers. A little potash can sometimes help fruit set as well.
Can I get you to check that this abundance of growth is not coming from under the graft line at the vine's base? If you're struggling to find it, please take another photo encompassing the soil to around 20cm up the vine.
You should find this guide useful: How to grow and care for passion fruit.
I'm looking forward to hearing more about your plant. Please let me know if you have any questions.
Mitchell
Hi Mitchell
Thanks for your reply.
As far as fertilizer goes I use an all purpose citrus and fruit one, I haven't fertilized this growing season yet as I thought that may have been the problem last year but it is doing the same thing this season anyway.
Watering wise it is on a drip system and gets watered around 3 times a week depending on the season. It is mulched so the roots wouldn't dry out.
See the pics below for the variety, not sure if it's self pollinating or not?
No ant issues on the vine itself other than the usual black ants on the ground.
The foliage is growing above the graft, see photo.
And although there are not a huge amount of bees around there are some and they did a good job on my fruit trees and love my Basil for some reason.
Hoping you could shed some more light on my issue now.
Thanks.
Hello @Meloncat
It's great that you've received excellent advice from @MitchellMc. Would it be possible for you to post a photo of the fertilizer you're using? If it has a heavy nitrogen content, this will often cause flowers to drop off. I recommend trying Searles 250ml Liquid Potash. It's a fertiliser formulated for promoting bigger and better flowers. It improves fruit and vegetable size, quality, and quantity, as well as promoting hard plant growth and disease resistance. Please note that this is a concentrate and must be diluted before use.
If you need more advice or information, please let us know.
Eric
The graft line and growth photo is a bit busier than what I would like to see. I'm looking for a definitive graft line and all growth being above that line with no suckers coming out from under it or at ground level. Can you show me at ground level in the one photo? We need to establish that all this green growth isn't just the rootstock.
If you haven't moved it, the tag is attached to the plant's main stem, but my concern is all that growth is from well below that line.
Mitchell
I have exactly the same problem, FOR THE SECOND TIME 
I bought the big spotted variety from Bunnings a few years ago and it went crazy, huge healthy vine, hundreds of flowers, but NOT ONE passionfruit for about 3 years until I cut it out. I bought the same one again and am having the exact same problem AGAIN. I have a Passiflora edulis (Black Passionfruit) within 4 metres of this vigorous plant and it is loaded with fruit, so the problem has nothing to do with soil or water. IF the case is that I need TWO plants together to get fruit the WHY didn't Bunnings staff tell me that when I bought the second one?
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