Passionflowers - Extraordinary Exotic Beauties

The genus Passiflora (Passiflora) includes over 500 species. Although these are tropical or subtropical vines, many of them thrive even in indoor conditions.

Passion flowers are decorative mainly for their complex flowers, which can be found in all possible colors - yellow, pink, red, purple and blue. Some are also grown for their delicious fruits, known as passion fruit or granadilla.

Commonly Grown Passion Flower Species

Blue passion flower (Passiflora caerulea) is the most commonly grown passion flower. In summer, it blooms very abundantly with blue-white flowers.

The leaves are deeply lobed, the flowers captivate with their unusual structure and fragrance. It grows very quickly. It is also used as a medicinal plant.

Blue passion flower can be used to pollinate other passion flower species as well. It is undemanding, suitable even for beginners.

Passiflora Constance Elliot (Passiflora Constance Elliot) blooms with beautiful white flowers. This is a cultivar of the blue passion flower.

Red passion flower (Passiflora racemosa) has narrow, bright red flowers that grow in whole clusters.

Flower clusters can reach up to 30 cm. The fruits are not suitable for consumption.

Banana passion flower (Passiflora mollisima) blooms with delicate pink flowers. It is often grown for its very tasty fruits resembling small bananas in color and shape.

Giant granadilla (Passiflora alata) blooms with beautiful large red flowers. The fruits reach weights of up to 0.5 kg. This passion flower is more demanding in terms of heat, greenhouse cultivation suits it well.

During winter, the temperature should not drop below 12-15 degrees, though it also depends on the age of the plant. Unlike most other passion flowers, it doesn't have divided leaves, but entire ones.

Purple passion fruit (Passiflora edulis) is grown not only for interesting flowers, but also for its tasty fruits called "passion fruit," which can be eaten both fresh and processed into various jams or juices.

This species has two types of leaves - three-lobed and entire, with both types often occurring simultaneously on one plant. Ripe fruits have a dark purple color.

Growing Passion Flowers

Passion flowers are propagated either by seeds or cuttings.

When growing passion flower from seed, prepare pots with substrate for sowing and propagation or for houseplants. Place the seeds in a cloth bag or piece of gauze and let them swell in lukewarm water for 1-2 days. This will speed up germination. It's also possible to carefully score the seeds or file them so water can penetrate the hard shell faster. However, such intervention can destroy the seed, so proceed very carefully.

Sow the swollen seeds just below the substrate surface. Keep it moist throughout the germination period. Passionflowers germinate quite slowly - depending on the species and seed treatment, it takes 1-6 months. So don't panic if your passionflower doesn't germinate immediately.

When propagating from cuttings, proceed as with other plants - dip the cutting in a rooting stimulator, plant it in light substrate and cover with plastic to maintain humidity.

Young plants appreciate rather light substrate (for example for houseplants) and plenty of light. Passionflowers grown from seed bloom later, only in their 2nd - 3rd year. However, plants from seeds are more suitable if you want fruits.

Later, once the plant has grown stronger and we want to encourage flowering, it's better to repot the passionflower into heavier substrate. In light substrate, passionflowers grow well but don't produce many flowers.

Since these are vigorously growing vines, your passionflower will need support to climb around.

Passionflowers look very decorative when you wind them around wire structures, for example in the shape of a circle or heart.

From spring to autumn, fertilize passionflowers with flowering fertilizer. In optimal conditions, passionflowers produce 1-3 flowers behind each leaf, which open gradually. Each flower blooms for only one day.

Flowers are sometimes pollinated by bees, but if you want to obtain passionflower fruits, it's better to handle pollination yourself with a small brush. Transfer pollen from one plant's flower to another plant's stigma. Different species of passionflowers can often be cross-pollinated. Passionflowers are mostly not self-fertile, so you need at least 2 different plants.

Passionflowers appreciate plenty of light, even direct sun. Only then will you get abundant flowers. In summer, they'll benefit from being outdoors or on a balcony.

In autumn, stop fertilizing passionflowers and repot them into a new pot. For older plants, you can use the same pot after rinsing and replacing the substrate - this will support flower production the following spring.

Prune the shoots to about 3 nodes or 10-15 cm. Passionflowers only produce flowers on new growth. During one growing season, a passionflower can grow up to 5 m, so don't worry that pruning will harm the plant. You can alternatively do the pruning in spring.

Overwinter passionflowers in a bright room at a temperature around 10 degrees.

Some heat-loving species appreciate temperatures around 15 degrees Celsius (giant granadilla), while others are frost-resistant - blue passionflower can be grown outdoors year-round in some areas of the Czech Republic if properly winterized. It tolerates temperatures down to -8 degrees Celsius and regrows from the roots in spring.

During winter, we don't fertilize and water only enough to prevent the substrate from drying out.

Passionflower as Fruit and Medicinal Plant

Species grown for their fruits include Passiflora edulis (passion fruit, maracuja), Passiflora mollissima (banana passionflower), Passiflora alata (giant granadilla), Passiflora ligularis (fruits known as "granadilla"), Passiflora maliformis, and Passiflora quadrangularis.

The fruits are used not only for direct consumption but also in salads, juices, yogurts, and jams. They have a sweet-sour, very refreshing taste. They are very rich in vitamin C content.

For its medicinal properties, purple passionflower (Passiflora incarnata) is especially cultivated. Its flowers and fruits have calming, sedative effects, helping with anxiety and insomnia. It is non-addictive. It is also used in pharmaceutical production.