Passionfruit - Oh the sorrow!

Passionfruit can grow well in Western Australia. Some vines produce 100+ fruit per year and at $1 each to buy it was an easy decision to plant a few.

We chose this spot for the first two vines.  It gets the morning sun until about 3pm in Summer and is protected from the burning Westerly sun.  

The vines grew so well that a few months later Gerry had to construct a sturdy trellis. This one is made from a frame found while Gerry was curb crawling ;) (during curbside rubbish collection).

The sorrow. Despite the lush growth we've had no fruit. The flowers drop off before fruit set. We're wondering if the plant is getting too much nitrogen.  An internet search suggests it could be missing vital nutrients so we pruned it back a little and added lime and trace minerals but now, a week later, we're not seeing any improvement.

Because of our early success we decided we'd plant two more vines.  This was a big mistake as one of the vines we chose has become a weed.  The roots send out shoot that are popping up where we don't want them.  At first we cut the shoots at the base but have since found out that this is a bad idea as it encourages the plant to send out more shoots. We're not sure how to solve this problem. As you can see we do have three fruit growing on these straggly vines.