Soak dried seeds in lukewarm water for a couple hours to overnight. This can shorten germination time to about 5 weeks instead of 10.
Sow seeds indoors in early winter in order for them to be ready to transplant after the last frost. Place one or two seeds each in peat pots or well-draining containers filled with a seed-raising mix. Plant 1/2 inch deep, and water well.
Put the seeded pots in a warm, sunny area. If you put the pots on a heating pad and bottom-heat the seeds at 70 to 80 degrees Fahrenheit, germination can be sped up to as soon as 1-2 weeks, whereas at lower temperatures, seeds can take up to 10 weeks.
Transplant seedlings outdoors when they are about 10 inches high. Have very nutrient-rich soil ready in a sunny spot and have something--a fence or sturdy trellis--for the vines to grow on.
Water and fertilize the banana passion fruit vines regularly throughout the growing season to ensure the beautiful pink-red flowers and fruit, which should begin to appear in the second year.