Passiflora Quadrangularis (Giant Granadilla)

Passiflora Quadrangularis Seeds (Giant Granadilla Seeds)

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Grown for its large ornamental fragrant flowers and its large fruits.

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Passiflora quadrangularis, also named Passiflora Macrocarpa or Giant Granadilla, is a perennial vine, looking much like Passiflora alata, but its flowers are bigger. Native to Central and South America it is grown for it's large ornamental fragrant flowers and the large fruits. It climbs by means of clinging tendrils and can be kept as an container plant. The long tendrils need lots of support for climbing. Fast growing vine which can grow over 50 feet high. It may be grown as a houseplant in a sunny South-facing window. A vigorous tropical vine with large bright green oval leaves, 7-13 cm long, 6-10 cm wide. The stems are quadrangular in shape. One of the loveliest and most exotic of the Passion flowers producing gorgeous purple, white and blue banded fragrant flowers, measuring 8-10 cm across in a long succession from mid Summer to Autumn. It produces giant green to yellow Passion fruits reaching over one foot in diameter. The pulp is white or grayish and is not as flavorfull as the common Passion fruit, but still tasty and often eaten or used in drinks. It rarely produces fruit under greenhouse conditions but makes up for this by the sheer glory of its flowers. 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. Protect from frost or plant in frost free areas. The Giant Granadilla is hardy to 35°F when mature, frost tender when young. Provide ideally a temperature of 15°- 28°C . Keep the atmosphere humid through the Summer and place in full sun, can tolerate partial shade. Passiflora Quadrangularis loves the warm humid Tropics. 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. 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.
Label No
Common name Giant Granadilla, Giant Tumbo or Badea
Family No
Genus No
Species Passiflora quadrangularis
Cultivar No
Therapeutic uses No
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.

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