I used to grow one inside my conservatory in a large pot, each spring I re-poted it into a larger sized pot till I felt it was large enough and once it was in the very biggest pot I then just removed the top 2-3 inches of soil from the pot and added fresh with some bonemeal with blood /fish already mixed from the garden store, we get this mix in a box and a handful per pot would be enough, this is a slow release fertiliser so I also added a liquid plant feed half strength every week till it began to show flower buds, at that time I did full strength liquid feed but, only going by directions on bottle.
These vines can live for many years and you should be able to grow your vine on a frame / trellis ect, after flowering or fruit has passed, you can trim it back to keep it a manageable size but remember they are large plants / vines once they are growing well,
You need to make sure the plant wont dry out but don't allow it to sit in a saucer of water, after watering, wait an hour and pour off any excess water left in the saucer, don't re-water till you have stuck your finger into the soil and if dry, the plant needs water, if still damp then leave off watering till the soil is dry.
Hope this helps you out and you have many years of pleasure from your Passion flower vine.
Good luck, WeeNel.
