I was asked about passion fruit earlier and growing so I decided to add it here for others too
The passion fruit grown as an edible fruit is
Passiflora edulis, it requires a minimum temperature of 16ºC, so if planting in the winter you need to grow in a greenhouse, ploytunnel or conservatory.
Position this climber in a sunny place and feed with high potash liquid tomato fertiliser in spring and summer. If you are wanting to harvest your fruit then wait until they have shrivelled on the plant
Prune sideshoots back to two or three buds in mindwinter, the hardiest passion fruit
P. caerulea, produces lots of orange fruits in good summer but these, while edible, aren´t particularly palatable
This is what we have and I must admit the fruit is not great but I still love looking at the gorgeous flowers and watching the bees pollinate
Cultivation of PassifloraPassion flowers can cause some issues when trying to grow because their roots are prone to rot if cold and wet. They are known to grow in arid areas, they require exceptionally well drained soil. Ideally you should use free draining, soil based mixture of equal parts sharp sand or gravel, medium or course peat and loam vs a peat based compost which can easily become waterlogged.
If planting from a cutting in winter then it is better to grow indoors to protect the roots until early spring.
Try to maintain soil temperature of 18 - 21 C. Cuttings will root at lower temperatures but may take a little longer. Many species and varieties will root on a warm windowsill, but it may be necessary to cover them with a clear polythene bag for the first week or so. Don't let the cuttings get too wet inside so I would suggest you remove the bag for a while each day or make some small holes in it for ventilation.
General Gardening Spain