Red passion flower is a tropical South American vine that transforms into a living fireworks display from July through September, producing intensely showy scarlet-to-deep-red passion flowers followed by edible orange-yellow fruit. Hardy only in zones 10-12, this evergreen tendril-climber reaches 10 to 12 feet tall and 3 to 5 feet wide, thriving in containers that can be moved indoors during cooler months. The smooth red to purple stems support medium green, finely serrate oblong leaves, creating an architectural backdrop for flowers that measure 3 to 4 inches across and attract hummingbirds and butterflies throughout the growing season.
Partial Sun
Moderate
10-12
144in H x 60in W
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High
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Passiflora coccinea produces some of the most arresting flowers in the passion flower genus, with scarlet-red petals and dramatic corona filaments that capture attention immediately. The flowers aren't merely ornamental; they're followed by edible passion fruit (red granadilla) that ripens from orange to golden yellow, extending the plant's season of interest well past peak bloom. This vine rewards warm light with abundant flowering and handles the humidity and heat of tropical and subtropical gardens without fussiness, making it surprisingly approachable for gardeners willing to provide winter protection in cooler climates.
Red passion flower serves multiple purposes in the garden. The stunning flowers attract hummingbirds and butterflies, making it essential for pollinator gardens and wildlife-focused landscapes. The edible passion fruit (red granadilla) can be eaten fresh when ripe, scooped directly from the skin, or processed into juices and sauces. The vine itself is grown as an ornamental specimen on trellises, arbors, and in containers where its dramatic flowers and architectural foliage create visual impact.
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Passion flower seeds can be started indoors in a warm location and transplanted outdoors after the last spring frost date when soil has warmed.
Move container plants outdoors in full sun after the last spring frost date, when nighttime temperatures remain consistently warm. Space plants or trellises 3 to 5 feet apart to accommodate mature width.
Passion fruit (red granadilla) is ready to harvest when it has transitioned from orange to deep golden yellow. The fruit should feel slightly soft when gently squeezed, indicating ripe flesh inside. Cut fruit from the vine with pruners or gently pull to detach; harvest typically occurs from late summer into fall, following the bloom period.
Prune red passion flower after flowering or during early spring to shape the vine and encourage branching. Remove any dead or damaged stems and thin crowded growth to maintain good air circulation, which helps prevent fungal problems in humid conditions. Light pruning throughout the growing season controls size and encourages repeat flowering.
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“Passiflora coccinea hails from South America, where it evolved as a tropical, tendril-climbing vine in humid, warm regions. The plant carries both common names in its heritage: red passion flower reflects its striking blooms, while red granadilla, the local name for the fruit, speaks to its importance in South American gardens and cuisine. Though originally native to tropical forests, it has been widely cultivated in ornamental gardens globally, valued equally for its sculptural flowers and edible fruit.”