Purple Granadilla - 5 seeds
Germination - Soak seed in warm water for 24 hours before sowing, in a good seed compost at 1/4" deep. For Passiflora seeds, instead of using water you can use a high pulp fruit juice such as passion fruit juice or orange juice. The acid in these juices will soften the shell and speed up germination. Keep damp soil, not soaking wet. Keep pot in warm situation 20°C/68°F, 24°C/75°F. Cover the top of the pot with clear plastic so the humidity will remain high.
When you see some tiny plants starting to sprout, slowly open the top of the pot, a little each day, so that the new seedlings don't go into shock from the humidity being lowered too quickly. Germination of Passiflora can occur in weeks or take several months. If you want to speed up germination, you can use the bottom heat technique, but it isn't a must.
Scarification / Stratification - If your home is on the low side of 70ºF, your seeds will benefit from bottom heat. Give warmth from underneath to stimulate early growth, and to help seeds to germinate. The ideal situation is to maintain the soil temperature at 70ºF. For this, you use an electric soil warming cable kit, or a heating mat that goes under your flats; or any other source of heat. With the proper temperature, you will cut by 2 or 3 the germination time. –Passiflora edulis, or the Purple Granadilla, is a vigorous vine, especially in the Tropics, the Passion Fruit can grow over 20 feet in a single year. The stems are up to 15 meters high. Native to South America, from Paraguay, Brazil, and Argentina, the Passion Fruit is now grown around the world, and sizable feral populations now occur in Asia, Australia, and Hawaii. The Passion Fruit is subtropical and is found at higher elevations in the tropics. In Hawaii, it tends to grow wild above 1000 feet. Passiflora edulis is a perennial exotic vine, great for hanging baskets or a trellis. It may be grown as a houseplant in a sunny South-facing window. A Passiflora that produces very fragrant, unusual flowers. The flowers are white, except the base of the corona which is purple; the filaments are curly, as long as petals; 5-7 cm across. Flowering occurs from April to November but may occasionally continue year-round if conditions are right. Flowers will self-pollinate and are followed by green fruit, 6 cm long, turning purple when ripe. Fruits usually ripen from flowering in 80 days. The fruit is filled with wonderfully tart, bright orange pulp. The edible purple fruits possess pleasant flavour, kind of sweet and a little tart. Evergreen leaves, deeply 3 lobed, shiny and deep green above, paler and dull beneath. The long tendrils need lots of support for climbing. Grow in sunniest window or greenhouse and provide support of trellis. 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. Hardiness zone 10, (1°C/35°F) in Winter. It has only mild hardiness, surviving temperatures to 35°F, so protect from any frosts. Provide ideally a temperature of 15°- 28°C in Summer and 13-18°C through the Winter. It will do best in a loam based mix with a little peat moss. Passion flowers like full sun and will scramble over trees and shrubs to get it. 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. 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