Passiflora quadrangularis or Giant Granadilla is the biggest of the Passiflora and can be invasive in tropical or subtropical regions.
It’s not frost tolerant but its huge and striking flowers, big fruit and vigorous growth make it a must have in your collection.
Flowers are remarkable: red, violet and white, about 10 cm in diameter and fragrant.
Passiflora quadrangularis is a vine with tendrils of 10-15 m long, sometimes longer.
Young stems are quadrangular, with narrow wings.
The petiole is 3-5 cm long, the leaf blade is ovate to suborbiculair 7-13 cm long and 5-15 cm wide.
The inflorescence is a reduced cyme. The flowers are 6-8 cm in diameter, sepals are green on the outside, red on the inside, sparsely pubescent, 3-4 cm long. Petals are bright red, oval to oblong, 2.5-3.5 cm long. The corona is composed of 5 series of filaments, white or purple, filamentous.
The fruit is yellow to orange at maturity, ovate, 20-25 cm long and sometimes longer, the skin is thick and fleshy. The fruit contains many flat seeds, 7-9 mm long.
The fruit is edible but not very savory and mainly used in juice.
The root is used as endemic and narcotic.
Giant granadilla, Granadilla, Nutsulet, Sirsijo, Square-stemmed Passion flower, True granadilla
Granadilla quadrangularis, Passiflora macrocarpa, Passiflora macroceps, Passiflora quadrangularis var. sulcata, Passiflora sulcata, Passiflora tetragona
Passiflora: from the Latin passio (Passion) and flos (flower)
Quadrangularis: from the Latin quadrangulus (4 corners) because the stems are quadrilateral
Flood plains in rainforests
USDA zone 10-11
Fertile and well drained
Water daily during summer, less in winter
Liquid universal fertilizer weekly
Root growth is inhibited in a small pot and flowering encouraged, root growth is encouraged in a big pot and flowering inhibited
- use preferably fresh seeds
- scarify the seeds with sandpaper or sand
- soak the seeds in water at room temperature for 24h
- plant in potting soil, a 1 cm depth
- provide soil heating and switch the heating off at night so that the temperature fluctuates
- keep the substrate moist
- do not discard the seeds if they have not germinated after a few months, it can take more than 6 months