Passiflora quadrangularis, commonly called giant granadilla, is a woody perennial evergreen tendril-forming vine in the passionflower family, Passifloraceae. It is the largest growing vine in its family, climbing over 100 feet into trees and then covering their canopies. This species is native to all of South America and primarily to Brazil. Stems are square-shaped with tendrils reaching up to 1ft. in length. Leaves are alternating and ovate shaped, measuring 3 to 6 inches wide and 6 to 8 inches long. Flowers have 5 reddish pink petals, and 5 reddish pink sepals which resemble the petals. Purple to white corona filaments form a ring above the petals. Passiflora quadrangularis flowers also have 5 cream white stamens and three stigmas of the same color. The flowers are said to be highly fragrant with the ability to smell it from far distances. Passiflora quadrangularis fruits are lime green, 1 foot long, and melon shaped. (CATION: the raw root is a potent narcotic and poisonous.) Passiflora quadrangularis has multiple uses as medicine and as a food crop. The leaves, flowers, and fruit are edible. Medicinal teas are made out of the flower to battle anxiety, epilepsy, and insomnia. Juices and ice cream can be made from fruit. enjoy frequent fertilizations, good support to climb on, and pruning during late winter/early spring before growth begins. Well-drained soil with high organic matter is an ideal medium to grow in. Soil should be kept moist but can occasionally become dry (idealing during winter). The plant enjoys full sun to partial shade. USDA plant hardiness zone 9b and higher.
Passiflora quadrangularis seeds should be pretreated with a light scarification from sandpaper or file which significantly reduces germination time as the seed coat is hard. After scarification, soak the seeds in warm water for 24 to 48 hours prior to planting. Plant the seeds ½ to 1 inch deep in a well draining potting mix. Plant the seeds at least ½ inch apart from each other to prevent overcrowding. Keep in high moisture and humidity but make sure the soil does not stay soaking wet. Ideal germination temperature is between 60°F to 85°F. Germination typically takes 10-21 days with pretreated seeds. Seeds without pretreatment may take months to germinate. Even with optimal conditions, germination may be slow and sporadic.
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