Black Knight Passiflora is a vigorous South American vine grown for its striking dark purple-black fruit and delicate, bicolored flowers. Native to South America where it's known as grenadilla, this cultivar of Passiflora edulis produces egg-sized passion fruits with excellent flavor, even in small containers. Hardy in zones 10-11 and blooming from summer through fall, it's an unusual compact vine that flowers consistently and makes a rewarding indoor or outdoor edible plant.
Full Sun
Moderate
10-11
?in H x ?in W
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High
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The vines grow with surprising vigor yet remain unusually compact, making this variety thrive even in small pots where other passion vines sprawl unmanageably. The dark purple-black fruit arrives in generous clusters, each the size of a large egg, with a sweetness and depth that reflects the variety's South American heritage. Lightly fragrant white flowers with striking purple inner crowns appear throughout summer and fall, and the plant rewards hand-pollination indoors with reliable fruit production.
Black Knight Passiflora is grown primarily for its edible passion fruit, which is harvested at full ripeness and eaten fresh or used to flavor beverages, desserts, and sauces. The fruit's aromatic interior pulp can be scooped directly from the rind or pressed into juice. Its fragrant flowers also serve ornamental purposes, making the plant valuable as both a productive edible and an attractive landscape or container specimen.
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Harvest passion fruits when the rind turns completely dark purple-black and yields slightly to gentle pressure, typically in late summer through fall depending on your climate. The fruit should feel heavy for its size and may develop light wrinkles on the surface as it fully ripens. Cut or gently twist the fruit from the vine; ripe passion fruits may also drop naturally when ready. Chill before eating or processing if desired.
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“Passiflora edulis originates from South America, where indigenous and settler communities have cultivated grenadilla for centuries as both a food source and ornamental. The species was eventually distributed through European and American nurseries, where cultivars like Black Knight were developed to suit container growing and indoor production. This particular selection represents a refinement of the species toward compact growth and reliable fruiting in controlled environments, preserving the plant's vigorous character while making it accessible to home gardeners without sprawling space.”