For warmer zones, can be greenhouse grown, or in tubs on patio. A beautiful vine with large 3-lobed leaves followed by edible yellow fruits 4" in length. Cannot ship to HI.

Blue passionflower is a twining vine that can grow to 30 ft (9.1 m). The shiny leaves are usually palmately lobed with five parts, but they can have as few as three lobes or as many as nine. They are evergreen in tropical climates, but deciduous where winters are cool. The white and purple-blue flowers which appear in summer may be as large as 4 in (10.2 cm) across. They are followed by egg-size deep orange fruits from late summer through fall.
Blue passionflower likes loose sandy or gravelly soils and does best planted in old brick rubble that retains heat during cold winter weather. Too much manure or compost will result in lush vegetative growth and poor flowering. This species will flower in a small pot, but it prefers plenty of root space and will do better in a roomy container. In Zone 8-9, the ideal location is against a warm south-facing old brick wall where an overhang prevents excessive drenching by heavy rains.
Go light on fertilizer and water deeply, but infrequently; passionflowers should be encouraged to reach deep into the earth for water. When motivated to do so, they are capable of developing amazing root systems to sustain them through droughts and freezes. Passionflowers love high humidity, but they are subject to fungal diseases if they don't get good air circulation in the greenhouse. Blue passionflower does better overwintered in a cool greenhouse where it can go semi-dormant as opposed to in a hothouse where it will be tempted to put too much energy into weak off-season growth. In either case, it is important to keep the soil on the dry side in the winter.
Blue passionflower may be wound around a hoop support to keep it within bounds so that it may be grown as a houseplant in a sunny south-facing window. Passifloras flower on new growth, so they may be pruned early in the growing season. It is best to cut some stems back nearly to the base, rather than just trim the tips. The terminal buds may be pinched out to encourage branching. Always keep some green foliage on the plant to keep the sap rising and encourage rapid regrowth. The roots may be weakened and become subject to fungal infection if too much top growth is removed at once. Don't try to train a passionflower to be too neat and compact; branches allowed to hang loose and droop a bit will be the ones most inclined to flower. Passionflowers are subject to a wide array of pests and diseases, but most of them have minimal impact on well grown plants. Butterfly larvae are the exception; caterpillars readily devour the foliage of healthy mature plants.
Passionflowers like full sun and will scramble over trees and shrubs to get it.
Hardiness: USDA Zones 8 - 11. Blue passionflowers will regrow from deep roots after even severe freezes. They have been known to survive temperatures as low as 5°F (-15°C) when the ground was frozen over two feet deep! It is nevertheless important to keep the soil as warm as possible, especially in the winter greenhouse.

A North American species that grows to a bit more compact than other passifloras, making it an easier variety to keep under control. This is a very herbaceous vine and dies back every Winter, only to pop back in May, hence the name Maypop ( though I think the names comes from stepping on the fruit and the pop it makes ).
It climbs by means of clinging tendrils and can be kept as an container plant. The long tendrils need lots of support for climbing. It may be grown as a houseplant in a sunny South-facing window. It has large scented flowers, from June to November, with pale lavender petals and purple filaments which are kinked at the tip. These are followed by sweet edible fruits which are yellow when ripe. The leaves are tri-lobed and 15 cm large. Pruning is a must to keep the vine healthy. Prune off less vigorous growth and occasionally prune back vigorous growth to promote flowering.
When established, and without care, the passion fruit can easily overtake other garden plants, shading them from sun. One of the easiest Passiflora to grow and has the best cold hardiness. Keep the atmosphere humid through the Summer and place in full sun, can tolerate partial shade. You may need to water your plants on a daily basis during the hottest Summer months. During the Winter the roots should be kept moist, but as growth will be much slower you will probably only need to water once a week, depending on growing temperature. It will do best in a loam based mix with a little peat moss.
Fertilize at least once every two weeks in the growing season.
If their pot is too large or if they have an unrestricted root run then the whole plant will simply get bigger and bigger but it will refuse to flower and therefore produce the fruits. By limiting the pot size you are limiting the ability to grow and this is seen as a threat, so the natural mechanism is to produce seed for the next generation. A suitably sized pot for an adult plant would generally be of 12 inches in diameter.
Hardiness zone 8-11.

A vigorous vine that is woody at the base and climbs onto structures or high into trees using tendrils with heart-shaped 4 to 8 inch long leaves that are of a medium green color and paler below with prominent veins. In the warmer months of the year appear the 4 inch wide sweetly fragrant flowers, often in pairs at the leaf base. These flowers have greenish white sepals and light pinkish-white petals with 2 ranks of filaments that are banded with bluish purple.
The outer shell is hard and slippery, and has soft padding on the interior to protect the seeds. The seeds, which are hard and black, are surrounded by a gelatinous sphere of transparent pulp. The pulp is the edible part of the fruit and has a soft sweet taste. It is very aromatic and contains vitamins A, C, and K, phosphorus, iron, and calcium.
Winter Hardiness: 25-30° F