Scarification: soak in warm water, let stand in water for 12 hours
Stratification: none required
Germination: Sow in late winter or early spring in a greenhouse, seeds will germinate in 1-12 months at 20 degrees C. Keep in a greenhouse for the first winter and plant them outside late spring or after last frost. Mulch roots in the fall to protect from cold.
Passiflora caerulea, also known as Blue Passion Flower, Bluecrown Passionflower, or Common Passion Flower, is a woody vine that can grow up to 15-20 meters high where there is supporting vegetation available. Its leaves are palmately five-lobed, and each leaf has tendrils that twine around its support. The flowers are complex, approximately 10 cm in diameter, with five sepals and petals. They are usually fragrant and surrounded by a corona of blue or violet filaments, five greenish-yellow stamens, and three purple stigmas. The fruit is an oval orange-yellow berry that is 6 cm long by 4 cm in diameter and is eaten by mammals and birds. Due to its intricate and beautiful flowers, the Blue Passion Flower is popular in gardens. It is also associated with Christian symbolism representing the passion of Jesus. The plant is native to Brazil, Uruguay, and Argentina and is cultivated worldwide. The plant can be used as a rootstock for less hardy members of this genus, conferring additional cold tolerance. Be careful that root suckers do not take over the grafted plant. Overall, the Blue Passion Flower is a beautiful and intriguing plant that can bring a touch of exotic elegance to any garden.