Passiflora edulis is native to southern Brazil through Paraguay and northern Argentina Passiflora edulis is the species grown for it's fruit, however it is not hardy except in the very mildest locations in the UK. In other areas it will be killed by the cold unless you can offer protection. If you just want to get on and buy the plant skip the next paragraph!
The reputed history of how the flower obtained its name is worth a few lines. Many theories relate to the naming of this plant; most of them alluding to the "qualities" of the fruit; however, Dr Master; a 19th century expert on Passiflora and author of Contributions to the Natural History of the Passiflorace, conjectured that the name Passiflora or Passion Flower; was originally given by the Spanish priests in South America who associated the parts of the flower with the instruments of Christ. Passion: Three stigma representing the three nails; 5 anthers representing the 5 wounds; the corona representing the crown of thorns or the halo of glory; the 10 tepals representing the 10 apostles (Peter and Judas being absent) and the lobed leaves and whip like tendrils representing the hands and scourges of his persecutors.
So, there you have it. Passiflora edulis produces large white flowers with central filaments of purple and blue from July to September, they are followed by delicious bright orange fruits. It has lush dark leaves, and is easy to grow if in a heated greenhouse or conservatory. Plant in full sun and a fertile, moist, free draining soil. In pots and containers use a good quality John Innes No.2 compost and add an 8 - 9 month controlled release fertiliser for best results.