Shrub · Passifloraceae
Passionfruit
Passiflora edulis
Give it full sun, sharp drainage, and a strong trellis, and this fast vine rewards you with fragrant fruit.
Full sun
Every 2–4 days
50–86°F · 10–30°C
70–75 days
Overview
Passionfruit is a fast, tendril-climbing vine grown for its fragrant, jelly-filled fruit, and it earns its keep as a living screen across a sunny wall, pergola, or boundary fence. Its home is the warm country running from Brazil down into northeastern Argentina, and it brings that mood to a garden, asking for heat, humidity, and steady moisture to settle in. Given those, it can add more than 35 feet of growth in a single season, so a strong trellis becomes as much a design feature as a support.
Two main forms shape how it fits a place. The purple type is self-fertile and takes to cooler, higher ground, while the yellow type runs larger, wants a partner to fruit, and belongs in warm lowlands. Growers often graft the purple onto yellow roots to marry the two, since the yellow form resists the soil diseases that undo purple vines on their own roots, keeping a planting looking full for years.
Its moderate reputation reads as a plant that rewards a little routine rather than constant attention. The vine grows with ease, leaning mainly on sharp drainage to avoid root rot and a regular glance for the wilts and viruses that move quickly. Keep the soil moist but never soggy, fold a spring prune into the seasonal round, and the fruit ripens about 70 to 75 days after the flowers open, turning a plain fence into a productive corner of the day.
Care
The short version: full sun, fertile soil with sharp drainage, and small, frequent waterings to hold even moisture. Give it a strong trellis to climb where it can shape a space, feed it through the growing season, and prune it early each spring so it flowers on fresh wood.
Light
Passionfruit wants full sun to flower and fruit well, so it belongs on the brightest wall or fence a garden can offer. It manages in partial shade with a lighter crop, but the sunniest position is where it earns its place and its harvest.
Water
Give it small, frequent waterings to hold the soil evenly moist, roughly every 2 to 4 days, without ever letting it sit wet. Sharp drainage is essential here, since standing water at the roots invites the rot that undoes a vine outright.
Soil
Set it in moist, fertile, well-drained sandy loam that moves water through quickly. A pH between 6.0 and 7.5 suits it, so the soil can run slightly acidic to slightly alkaline without trouble.
Temperature
It settles best in the warm band from 50°F to 86°F (10°C to 30°C) and has no tolerance for frost. A hard cold snap into the mid-20s°F can take a vine to the ground, so it belongs in zones 9 through 12, with containers brought under cover where winters bite.
Humidity
In keeping with its tropical roots, the vine favors air on the humid side, around 50% to 80%. Dry air slows it, so a sheltered, humid corner or regular moisture around the plant keeps it growing and looking full.
Feeding
Work a balanced fertilizer every 4 to 6 weeks into the growing season, spring into fall. Ease off the nitrogen after the first year, or the vine turns into a wall of leaves at the expense of the fruit that makes it worth having.
Pruning
Prune early in the growing season, since the vine flowers only on new growth, and treat it as part of shaping the space. Cut out dead, weak, or crowded stems and shorten it hard to hold the vigor and keep the fruit within easy reach.
Repotting
Grown in the ground, it rarely needs repotting. In a container on a terrace, move it up a pot size each spring when the roots circle, vigor drops, or the soil dries out almost as fast as it is watered.
Size & spacing
This is a large, vigorous vine, climbing 10 to 20 feet (3 to 6 m) and spreading 3 to 10 feet (90 cm to 3 m) wide, enough to clothe a whole structure. Give it a strong trellis or fence and real room, because it can reach that size in a single fast year.
When to plant
Passionfruit lives by warmth and turns away from frost, which sets the rhythm of the growing year. Start fresh seed indoors in late winter to early spring, move the young vines to their permanent spot in spring once the soil has warmed and the cold has passed, and the fruit ripens from midsummer through fall, about 70 to 75 days after each flower opens, timing the harvest to the warm end of the season.
Northern hemisphere
Southern hemisphere
Typical months for a temperate climate: start earlier in warm zones, later where spring frosts linger.
- Sow: late winter to early spring; sow fresh seed, which germinates in 2 to 3 weeks
- Plant: spring after the last frost once soil is warm
- Harvest: flowers spring through fall; fruit ripens about 70 to 75 days after flowering, peaking midsummer through fall
Hardiness
USDA hardiness zones: 9–12
Temperature: down to -7°C
Troubleshooting
Most passionfruit trouble arrives as a sudden wilt, chewed leaves, or fruit that turns hard and woody, the kind of thing that disrupts an otherwise handsome planting. The fast-moving root and crown diseases are the ones to catch early. Match what you see below, then act before it travels down the trellis and thins the display.
A once-lush vine wilts and gives way overnight
When a vine that dressed a whole wall suddenly caves in, the culprit is almost always Fusarium canker or Phytophthora crown rot working quietly at the base. Look to the crown for dark, sunken lesions and the roots for soft, mushy tissue. An infected plant is past saving, so clear it out, correct the drainage that let it happen, and replant purple stock grafted onto yellow flavicarpa rootstock, which stands up to the disease and keeps the display going.
Fix:
- Remove and destroy affected vines
- Improve drainage and stop overwatering
- Graft purple scions onto yellow (flavicarpa) rootstock for resistance
Hard, woody fruit against a backdrop of mottled leaves
Thick-rinded, misshapen fruit set among leaves marked with a mosaic pattern is the calling card of woodiness disease, a potyvirus that aphids carry from vine to vine. Once a plant has it, there is no bringing it back. Take it out, destroy it, keep the aphids in check, and begin again on fresh ground with clean, virus-free stock.
Fix:
- Remove and destroy infected vines
- Control aphid vectors
- Replant with virus-free stock
The leafy screen turns to lace, sometimes veiled in webbing
Two small feeders undo a vine's green curtain. Caterpillars, the young of the butterflies the plant plays host to, reduce the leaves to their veins, while spider mites leave a fine webbing and a dusty, stippled cast across the undersides. Pick off the caterpillars, rinse the mites away with water or a little horticultural oil, and let resident predators settle the rest. A strong, well-spaced vine soon fills back in.
Fix:
- Handpick caterpillars
- Spray water or horticultural oil to knock back mites
- Encourage natural predators
Toxicity
The ripe fruit is safe and delicious, a natural fit for the kitchen, but the rest of the plant is not for eating. Leaves, vines, and unripe green fruit hold cyanogenic glycosides that can release cyanide when chewed, a mild hazard for pets and a reason to keep curious children clear of the foliage. Site the vine thoughtfully, stick to the ripe pulp, and it slips into a home without concern.
Toxic to
Cats · Dogs · Horses · Rabbits · Livestock · Birds
Safe for
People
Cats Mild
A cat that samples the leaves or a green unripe fruit may drool and bring its meal back up, with a little lethargy if it took more than a mouthful. The ripe pulp is not the concern, the foliage is, so a vine trained well out of a housecat's reach stays a non-issue.
Dogs Mild
A dog that works at the vines or green fruit tends to drool and turn queasy. A generous helping of leaves can leave it sluggish or short of breath, which is worth a call to the vet, so a patio vine sited past a dog's usual path spares the worry.
Horses Mild
Grazing on the foliage or unripe fruit can leave a horse off its feed and dull. The concern lies in the cyanogenic compounds in the leaves, never in the ripe fruit, so a vine kept clear of paddock fencing suits a country setting.
Rabbits Mild
Rabbits should never be offered the leaves or vines, which hold the same cyanide-releasing compounds. A small taste of ripe pulp now and then does no harm, so a hutch placed away from a trained vine keeps house and pet in easy harmony.
Livestock Mild
Cattle, goats, and sheep that browse the leaves and green fruit can develop digestive upset and low energy. Keep them off the vine, though the ripe fruit poses no real threat, so a fence line between grazing and trellis lets both share the same warm plot.
Birds Mild
Foliage and unripe fruit are best kept from pet birds because of the cyanogenic content. The ripe pulp is fine in small amounts as an occasional treat, so a cage set apart from an indoor-trained cutting keeps the room both green and safe.
People Ripe fruit safe
Ripe passionfruit pulp is a kitchen favorite and perfectly safe to eat, at home on a breakfast table or across a dessert. Simply leave the leaves, vines, and green unripe fruit be, and keep children from them the same way.
Skin contact is not a concern; wash hands after pruning. Keep curious pets and children from chewing leaves, vines or unripe green fruit.
Helpline numbers
United States
ASPCA Animal Poison Control: (888) 426-4435 (fee applies)
Poison Control: (800) 222-1222
Canada
Poison Centres: 1-844-764-7669
Varieties
Passionfruit comes in a handful of forms, sorted first by fruit color and then by named selection. These are the ones most likely to suit a garden.
Purple passionfruit (Passiflora edulis)
The self-fertile purple-fruited form, most at ease in the cooler air of high-elevation tropics.
Yellow passionfruit (P. edulis f. flavicarpa)
It carries larger yellow fruit, wants a second vine to pollinate, settles into warm lowlands, and doubles as the disease-resistant rootstock growers graft the purple form onto.
Possum Purple
A vigorous purple-fruited selection that has earned a following across Florida.
Frederick
A partly self-fertile hybrid that offers large fruit blushed with purple.
Companions
Passionfruit grows well alongside a few plants that draw pests away from the vine base, keeping aphids and nematodes off the roots and stems.
Plant near
Marigold: Interplanting near the vine base can help deter nematodes and some pests.
Nasturtium: Acts as a trap crop that lures aphids away from the vine.
How to propagate
Passionfruit can be started several ways, from a scoop of fresh seed to grafts and layers that copy a favorite vine exactly. The method you choose depends on whether you want a quick start or a faithful repeat of a plant that already suits the setting.
SeedEasy
Spring; sow fresh seed soon after removing it from the fruit · Germinates in 2 to 3 weeks; fruiting within about a year
Seed is the simplest place to begin and the most common. Lift it straight from a ripe fruit, sow it fresh in spring, and it sprouts in 2 to 3 weeks, with the first fruit following inside about a year. The yellow form is often raised this way to serve as seedling rootstock.
Stem cuttingsModerate
Warm season · Roots in several weeks
Semi-hardwood cuttings taken in the warm season let a named cultivar return true to type. They root over several weeks and hold the parent's character, something seed-grown plants cannot always be relied on to do.
GraftingDemanding
Warm season · Weeks to months
Grafting is the exacting choice, joining a purple scion to yellow flavicarpa rootstock during the warm season. The union takes weeks to months to form, and the reward is a vine that shrugs off Fusarium and nematodes far better than the purple form on its own roots.
Air layeringModerate
Growing season · Several weeks to root
Air-layering is a dependable way to clone a vine already earning its place. Wound a stem during the growing season and roots form over several weeks while it stays attached to the parent, so the new plant is well established before it is ever cut free.
Myths
Every part of the passionfruit plant is poisonous, so the fruit is unsafe to eat.
The fully ripe pulp is edible and enjoyed at tables the world over. Only the leaves, vines, and unripe green fruit hold cyanogenic glycosides that can release cyanide when chewed. Eat the ripe fruit freely and leave the foliage alone.
The ASPCA Purple Passion Vine warning applies to edible passionfruit.
The plant on that ASPCA page is Gynura aurantiaca, an entirely different species the ASPCA lists as non-toxic. It is not Passiflora edulis, so the warning never applied to the fruit-bearing vine that graces a garden wall.