Passiflora quadrangularis, commonly known as Giant Granadilla, is an evergreen perennial vine native to tropical rainforests in South America, particularly in Brazil and Colombia. It can grow up to 15-20 feet (4.5-6 meters) in a single season under ideal conditions. The vine is known for its large, nodding red flowers, which are surrounded by white and purple filaments, and it blooms throughout the year in its native habitat. The flowers are highly ornamental and can be quite showy, leading to its popularity as an ornamental plant. Additionally, it produces large, edible fruits that can reach the size of a melon, with a sweet, aromatic flavor.

Giant Granadilla is valued for its rapid growth, exotic flowers, and large, tasty fruit. It is often used in tropical and subtropical gardens as a feature plant on trellises, arbors, and fences. In cooler climates, it is grown in greenhouses or as a houseplant. This vine requires a minimum temperature of 15 °C (59 °F) and thrives in full sun to partial shade. It prefers a well-draining soil rich in organic matter and consistent moisture. While it is not drought-tolerant, it can suffer from root rot in overly wet conditions. The plant has gained the Royal Horticultural Society’s Award of Garden Merit, indicating its value in cultivation. Potential problems include susceptibility to spider mites and whiteflies, especially when grown under glass. It is also prone to fungal diseases in humid conditions.CC BY-SA 4.0