Question 1

What is Passiflora quadrangularis called in Sri Lanka?

Accepted Answer

In Sri Lanka, Passiflora quadrangularis is sometimes referred to as giant granadilla or giant passion fruit. It may also be called 'rath alu' in some local contexts, though naming can vary by region and community.

Question 2

Can you eat the fruit of Passiflora quadrangularis?

Accepted Answer

Yes, the fruit is edible in multiple forms. The unripe green rind is cooked as a vegetable in curries and stir-fries, while the ripe fruit yields a fragrant, jelly-like pulp that is eaten raw or used in juices and desserts.

Question 3

What are the medicinal uses of Passiflora quadrangularis?

Accepted Answer

In traditional Ayurvedic and folk medicine in Sri Lanka, various parts of the plant — including the roots, leaves, and fruit rind — are used for their reputed calming, digestive, and sleep-supporting properties. Therapeutic use should always be guided by a qualified practitioner.

Question 4

Is Passiflora quadrangularis native to Sri Lanka?

Accepted Answer

No, the plant is native to tropical South America. It has been introduced to Sri Lanka and is now cultivated in home gardens and small farms across the wet and intermediate climate zones of the island.

Question 5

What does the flower of Passiflora quadrangularis look like?

Accepted Answer

The flower is large and ornate, featuring the intricate corona of filaments characteristic of passionflowers, banded in white and purple. It is considered one of the more visually impressive blooms in the passionflower family.

Question 6

How do you grow Passiflora quadrangularis in a tropical garden?

Accepted Answer

The plant grows well in warm, sunny conditions with well-drained soil and a strong trellis or support structure. It can be propagated from seed or stem cuttings and typically begins flowering within one to two years. Regular watering and organic fertiliser encourage healthy growth and fruiting.

Question 7

Is giant granadilla related to the common passion fruit sold in shops?

Accepted Answer

Yes, both belong to the genus Passiflora, but they are distinct species. The common purple passion fruit (Passiflora edulis) is smaller, with an intense, tangy flavour. Giant granadilla (Passiflora quadrangularis) produces much larger, milder fruit and is used both as a vegetable and as a sweet fruit.

Passiflora quadrangularis

Other species in this genus