The purple passion flower is an interesting germination challenge that I haven’t quite solved. But below you can see what this large vine starts out as. It does produce large flowers with alien beauty. Flowers and fruit usually take a couple years to get going. Fruit is edible, but not the same as the passion fruit so commonly used on British cooking shows which is Passiflora edulis. The vine is vigorous and doesn’t stay put. Be careful where you plant it.
Germination: As pictured above. Seed was room-temperature stored and purchased in March 2016 making the seed less than 6 months old. Seed was pre-soaked in a solution for 24 hours, rinsed, and then covered in soil to 1/4 inch and germinated at room temperature with light which provided heat, though the light itself was unimportant. Germination was 27% at 9 days and 40% at 15 days. I stopped germination after 30 days. Remaining seeds were still hard.