This plant has giant fruits
Passiflora flavicarpa, the Yellow Passion Fruit, or Golden Passion Fruit, is native from southern Brazil through Paraguay to northern Argentina and now cultivated in all tropical areas. This is a vigorous perennial vine, with stems reaching lengths of 20 to 50, or even 80 meters high. It climbs by means of clinging tendrils. It grows on fences or trellises, or allow it to scramble over shrubs and trees. It can be kept as a container plant. It may be grown as a houseplant in a sunny South-facing window.
It's a fast grower with beautiful flowers and edible fruits. The flowers are fragrant, 6 to 9 cm wide. The corona is composed of white filaments, or white and purple. The first leaves are unilobate, becoming trilobate very soon. The leaves are glossy dark green and vary from 5 to 18 cm in length for the central lobe and from 4 to 17 cm for the lateral lobes.
The fruit is produced on a woody vine from bisexual flowers. The fruit is somewhat tart and contains many black seeds. It is less fragrant and slightly more acid than the Passiflora Edulis. Passion Fruit is commonly used in beverages. The yellow fruit is a round to oval, 6-12 cm by 4-7 cm. The pulp constitutes up to 55% of the fruit in the best selections.
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 the sun.
Hardiness zone 11, (4°C/40°F) in Winter. It has only mild hardiness, surviving temperatures to 40°F, so protect from any frosts. Passiflora Flavicarpa is best in the Subtropics and prefers full sun, it will scramble over trees and shrubs to get it. It is also more demanding in terms of heat and humidity than Passiflora Edulis, and will grow better at low elevations. Provide ideally a temperature of 25°- 30°C. It will do best in a loam-based mix with a little peat moss. Passiflora Flavicarpa likes light and evenly moist soil, mulch well.
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 in diameter.