Butterfly larvae actually feed on the fruits. Bloom time is usually spring until fall. The egg-sized passion fruit is green to yellow with a sweet taste, but very seedy. Growing Best climate areas to grow are USDA zones 6 or 7 to 9. Start a plant from seeds or softwood cuttings in early spring.
Seed germination can be difficult, and can sometimes take up to a year.
Soak seeds in warm water for 12 hours before planting. Plant seeds in well-draining medium the depth of the seed width or a little deeper. Keep seeds at 68 degrees f or 20 degrees c until sprouted. Keep watered regularly to encourage vine growth, and increase when the fruits are ripening. This fast growing vine will die back to the ground in the winter, returning in the spring.