Scientific name: Passiflora incarnata L.
Family: Passifloraceae
With its intricate, otherworldly flowers and calming reputation, passiflora is one of nature’s most fascinating plants. Also known as maypop, this fast-growing vine doesn’t just turn heads in the garden—it’s been valued for centuries in herbal medicine and cultural traditions.
Native to the southeastern United States, Passiflora incarnata stands out with its unique purple flowers and edible fruit. But there’s more to it than beauty: passiflora has long been used to support rest, ease anxiety, and promote gentle relaxation.
In this Plant Compendium entry, we’re exploring everything you need to know about this vine—from how to grow it to what it’s used for. Whether you’re looking to plant it, harvest it, or simply learn about its calming benefits, you’re in the right place.
History of Passiflora
Passiflora has a long and layered story, rooted in Indigenous knowledge and later embraced by herbalists and gardeners alike.
Indigenous Use
Long before Europeans arrived, Native American tribes—including the Cherokee, Apalachee, and Houma—used passiflora for a range of purposes. They brewed its leaves into calming teas, applied poultices to wounds, and ate the fruit for nourishment.
A Name with a Story
The name “passiflora”, or sometimes called “passion flower”, was coined by Spanish missionaries in the 1500s. They saw religious symbolism in the flower’s parts, interpreting the tendrils, petals, and filaments as symbols of the Passion of Christ. The name stuck—and so did the plant’s fame.
European Herbalism
By the 18th and 19th centuries, passiflora was a recognized remedy in European herbal medicine. It was commonly used to soothe nervous tension, treat insomnia, and support relaxation—uses that continue today in teas, tinctures, and supplements.
Modern Revival
Today, Passiflora incarnata is a popular choice in home gardens, herbal teas, and natural sleep aids. With rising interest in plant-based wellness, passiflora continues to shine both for its ornamental beauty and calming benefits.
Botanical Description
Passiflora incarnata is a perennial vine known for its show-stopping flowers and unique fruit. Here’s what sets it apart:
Roots: This vine has a deep and spreading root system. It often dies back in winter and regrows from underground rhizomes in spring.
Stems and Vines: Thin, green, and vining, the stems climb by curling tendrils. Left unchecked, they can reach 6–10 m (20–30 ft) in a single growing season.
Leaves: The leaves are deep green and three-lobed, resembling a trident. They’re arranged alternately along the vine and feel slightly leathery.
Flowers: The flowers are the showstopper: 3–8 cm (1–3 in) wide, with purple and white filaments radiating from a central crown. Each bloom lasts only a day or two but appears regularly through summer.
Fruit: Known as maypops, the fruit is egg-shaped, yellowish-green when ripe, and about the size of a chicken egg. Inside is a gelatinous pulp surrounding small black seeds. The flavor is mildly sweet and tart.
Growing Instructions
Passiflora can be an easy plant to grow if you give it the right conditions.
Sunlight: Full sun is ideal, though it will tolerate part shade. Aim for at least 6 hours of sunlight daily for best flowering.
Soil: Prefers well-drained, sandy or loamy soil. Slightly acidic to neutral pH (6.0–7.5) works well.
Temperature: Thrives in zones 6–10. It dies back to the ground in cooler zones but regrows in spring. It’s frost-tolerant once dormant but benefits from mulch in colder areas.
Watering: Moderate moisture. Water regularly, especially during dry spells, but don’t overwater. Established plants are drought-tolerant.
Spacing: Allow at least 1.5–3 m (5–10 ft) of space or trellising room. This plant can spread quickly if not managed.
Pruning: Cut back in early spring to promote new growth. You can also prune during summer to control its spread.
Life Cycle
Germination: Seeds need stratification (cold treatment) and may take 2–4 weeks to sprout.
Growth: Vines grow vigorously in warm weather.
Flowering: Blooms appear mid to late summer.
Fruiting: Fruit follows flowers and matures in late summer to early fall.
Dormancy: Dies back in cold winters and regrows from roots in spring.
Harvesting and Foraging
Harvesting
When: Leaves and flowers can be harvested mid-summer, while fruit is ready in late summer or early fall when it turns yellowish and slightly wrinkled.
How: Use clean shears to snip flowers and leaves. For fruit, pick gently when ripe and soft. Handle with care—maypops are delicate.
Foraging
Wild passionflower grows in fields, open woods, and along fences in the southeastern U.S.
Identify carefully—look for the distinctive flower.
Avoid areas with pesticide exposure or heavy traffic.
Only harvest where permitted and sustainably.
Plant Companions
Good companions help passionflower thrive—and keep pests away.
Good companions:
Milkweed – Attracts pollinators like butterflies.
Bee balm (Monarda) – Boosts pollinator activity.
Yarrow – Encourages beneficial insects and improves soil health.
Echinacea – Creates a visually appealing and pollinator-friendly area.
Avoid:
Aggressive vines like morning glory or kudzu—these can outcompete passionflower.
Heavy feeders that may deplete soil nutrients nearby.
Common Pests and Diseases
Though generally hardy, passionflower can face a few issues:
Caterpillars – Especially Gulf Fritillary larvae, which love the leaves. You may want to tolerate some if you’re supporting pollinators.
Spider mites – Tiny pests that thrive in hot, dry conditions. Spray with water or insecticidal soap.
Whiteflies – These sap-suckers can be managed with neem oil.
Root rot – Caused by soggy soil. Ensure good drainage.
Shopping Tips
Seeds and Seedlings
Buy from trusted nurseries or seed suppliers.
Look for Passiflora incarnata, as many hybrids are not hardy or useful medicinally.
Choose healthy seedlings with no leaf spots or pests.
Dried Herb
For teas or tinctures, look for whole dried leaves and flowers—organic is best.
Avoid products with fillers or unknown species.
Storage
Fresh Plant Material
Use flowers and leaves fresh or dry them immediately after harvest.
Dry in a dark, well-ventilated space and store in airtight jars away from light.
Fruit
Store ripe maypops in the fridge for up to a week.
Pulp can be frozen for longer storage.
Dried Products
Keep dried herbs in a cool, dark cabinet. Use within 1 year for best potency.
Culinary Uses
While passiflora is best known for its calming herbal tea, the fruit of Passiflora incarnata—commonly called maypop—is a delicious and versatile ingredient enjoyed in many South American cuisines and beyond.
Maypop Fruit
The maypop fruit is a treasure trove of sweet-tart flavor with a tropical aroma. When ripe, its tough outer shell splits open to reveal a bright yellow or orange gelatinous pulp studded with edible black seeds.
Here’s how you can enjoy it:
Fresh Eating: Simply scoop out the jelly-like pulp with a spoon and savor it fresh. The juicy pulp offers a delightful balance of sweetness and tang, perfect for a refreshing snack.
Juices and Smoothies: Strain the pulp to extract vibrant, fragrant juice that’s perfect on its own or blended into smoothies. It pairs beautifully with tropical fruits like mango, pineapple, and passionfruit for a refreshing and nutrient-packed drink.
Desserts: Maypop lends itself wonderfully to a variety of sweet treats. The pulp can be folded into mousses or custards, adding a natural tropical twist. Its bright flavor works well in fruit tarts, panna cotta, and parfaits, offering a fresh contrast to creamy bases.
Ice Cream and Sorbets: The pulp’s aromatic, tangy sweetness makes it an excellent ingredient for ice creams and sorbets. Its natural tropical notes give frozen desserts a vibrant, exotic flair, perfect for summer treats.
Sauces and Jams: Cook down the pulp with sugar to create rich, flavorful sauces that complement grilled meats, seafood, or desserts. It also makes delightful jams and jellies, capturing the fruit’s unique taste to spread on toast or swirl into yogurt.
Herbal Tea
The leaves and flowers of passiflora are often dried and steeped to create a mild, soothing herbal tea known for its relaxing properties.
This tea has a gentle floral flavor and pairs beautifully with other calming herbs like lemon balm, chamomile, and mint to create comforting blends.
Passiflora tea is enjoyed worldwide as a natural aid for relaxation, stress relief, and restful sleep.
Passiflora incarnata’s dual appeal—as both a therapeutic herb and a flavorful fruit—makes it a truly special plant with a rich culinary heritage, especially cherished in South America where the maypop fruit is celebrated for its bright, tropical taste and versatility in kitchens.
Health Benefits
Passiflora is known for its calming effects on the body and mind. It has been used in traditional herbal medicine for centuries, and modern science is now helping to explain why. The plant is rich in active compounds that support the nervous system, reduce stress, and promote overall wellness.
Mild Sedative & Sleep Support
Passiflora is often used to help people relax and sleep better. Studies show that it may be effective in reducing anxiety, calming racing thoughts, and improving sleep, especially in those with chronic insomnia. Some of its calming effects are due to flavonoids like apigenin and chrysin, which interact with calming receptors in the brain.
Nervine Tonic & Mood Support
Traditionally, passiflora has been used to soothe the nervous system. It may help reduce symptoms of anxiety, restlessness, depression, and even neurotic disorders. The plant contains natural chemicals like vitexin, isovitexin, orientin, and isoorientin that support emotional balance.
Muscle Relaxant & Pain Relief
Passiflora’s antispasmodic properties help relieve muscle cramps, tension headaches, and painful menstruation. Research has shown that extracts from the plant can also have analgesic (pain-relieving) effects, similar to aspirin in lab studies with mice.
Antioxidant Power
Passiflora incarnata is packed with antioxidants, which help protect the body from oxidative stress and free radical damage. Key antioxidants include flavonoids (like quercetin, kaempferol, and luteolin) and phenolic compounds that may help reduce inflammation and promote long-term health.
Anti-Inflammatory & Antimicrobial Effects
Studies have found that extracts from passionflower leaves and fruit can reduce inflammation and swelling. They also show antibacterial properties against several bacteria, including Vibrio cholerae, Pseudomonas putida, and Streptococcus pyogenes. The leaf extracts showed stronger effects than fruit extracts.
Addiction Support (Cannabis & Nicotine)
A unique compound found in Passiflora incarnata called benzoflavone (BZF) has shown promise in helping to reduce withdrawal symptoms from cannabis and nicotine in lab studies. BZF may help prevent the brain from becoming dependent on these substances and could offer support during addiction recovery.
CNS Effects & Seizure Support
Extracts from Passiflora incarnata may affect the central nervous system by calming overactive nerves. Animal studies suggest that it may help protect against seizures, possibly by interacting with benzodiazepine receptors, which are the same receptors used by some anti-anxiety and anti-seizure medications.
Aphrodisiac & Hormonal Balance
In traditional medicine, passionflower has been used as an aphrodisiac and for improving libido, especially in cases of low sex drive due to hormonal changes. It has also been suggested for menstrual irregularities and support during menopause, thanks to its effects on mood and hormone balance.
Key Compounds in Passiflora incarnata
Passiflora’s health benefits come from a rich mix of plant chemicals, including:
Flavonoids: vitexin, isovitexin, orientin, isoorientin, apigenin, kaempferol, quercetin
Alkaloids: harman, harmine, harmalin (mild MAO inhibitors)
Benzoflavones: including the tri-substituted BZF moiety
Cyanogenic glycosides: such as gyanocardin
Others: maltol, ethyl maltol, amino acids, and sugars
These compounds work together to create passionflower’s calming, antioxidant, and healing effects.
Always consult with a healthcare provider before starting herbal supplements, especially if you’re on medications.
Toxicity and Safety
Passiflora is generally considered safe for most people when used appropriately, especially in the form of teas, tinctures, or supplements made from Passiflora incarnata leaves and flowers. However, there are some important points to keep in mind:
Mild Side Effects: Some people might experience dizziness, drowsiness, or stomach upset, especially if taken in large amounts. It’s best to start with a small dose to see how your body reacts.
Drug Interactions: Passiflora may interact with sedatives, blood thinners, or medications for anxiety and depression. If you’re on prescription drugs, check with your healthcare provider before using passionflower products.
Pregnancy and Breastfeeding: There isn’t enough reliable information about safety during pregnancy or breastfeeding, so it’s best to avoid use unless supervised by a healthcare professional.
Children: Use caution with children and consult a pediatrician before giving passiflora.
Toxicity: Passiflora is not known to be toxic, and no serious poisonings have been reported when used properly. However, avoid consuming large quantities or parts of the plant not commonly used for herbal remedies (such as roots or seeds), as safety data is limited.
Pets: There is limited information about toxicity to pets, so it’s safest to keep passiflora out of reach of cats and dogs.
Environmental Impact
Native Plant: Passiflora incarnata is native to the southeastern United States, supporting local biodiversity and native wildlife in its natural range.
Drought Tolerant: Once established, passionflower requires moderate water and can tolerate dry spells, making it a sustainable choice for gardens in warmer climates.
Pollinator Friendly: Its intricate flowers attract a variety of pollinators, including bees, butterflies, and hummingbirds, helping to maintain healthy ecosystems.
Cultivation: Generally hardy and pest-resistant, passiflora can be grown with minimal pesticide use, supporting eco-friendly gardening practices.
