Passiflora - help!

Well, as its started growing now I'd leave it for this year, perhaps try to get the top growths to go downwards a bit.
Downward or horizontal growth always flowers better than upright growth.

Next year, depending on the winter we get, you could cut it back a bit in March, but not too hard, as it retards flowering.

 

The passionflower is very easily trained on trellises/rigging/netting.
You can just aim it all down, or gently persuade it to fill the entire support.
At my old house, we had a lovely one that after a few years had hundreds of flowers on it every year, with minimal care after the first couple of years.
Beware though, snails will rest in thier hundreds behind these plant if you have them against a wall.
Fan it out on your supports when you get new shooties. If your main stems are very woody and long, you can dig it up and plunge it down further(very long and retards growth).
If you wanna eat the fruits, only when fully ripe please, the plant is pretty sore tummyish.

 

Do you know which variety it is?

My experience of the most common one (I forget the variety) is that it will pop up in unexpected places when you least expect it to. Underground runners I think?

 

Spot on!

 

Its called layering

 

They defoliate in winter if they get too cold (compared to what they like ... rather than "frozen solid" )

I'm surprised it isn't shooting from the base - probably would if you cut it back - but I would go the propagation route, as a back-up if nothing else, and then once that is rooted maybe cut back next Spring (I'd leave it for the winter in case the cold kills the end of the stems - if they are cut short they won't have as much resilience )

I wonder if the pot is too small, or if it would prefer to be planted out?

If "all leaf" perhaps it needs a higher Potash feed to encourage flowering?

 

Once the roots spread out itl flower. Maybe even this year. Potash as someone else suggested too.
How old is it?

 

Do you know what species it is?
If it's a caerulea, then as above, the foliage does tend to get cut down in the cold, but one would expect it to regrow from the base.

But there are also a lot of hybrids available from garden centres. They tend to be labled as hardy, but in my experience, they aren't as "bomb proof" as caerulea.

 

I have the opposite problem in my side border.. it's growing too much, and doesn't die back in Winter!

 

Yup, if the are doing well, they can become rampant.