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Passiflora Caerulea Guide: How to Grow Blue Passion Flower

Passiflora caerulea or the bluecrown passionflower blooming in the garden

If you’re looking for an exotic plant to add to your garden or house, the Passiflora caerulea, commonly known as the blue passionflower, is a great choice. This beautiful vine is not only an excellent ornamental plant but is also easy to care for.

Passiflora caerulea, known as the blue passionflower or bluecrown passionflower, is a species of flowering plant native to South America. It has been introduced to other regions and is a popular choice for gardens due to its captivating, exotic flowers and ability to grow vigorously.

This vine is a deciduous or semi-evergreen plant with twining tendrils, and it can grow up to 10 meters (33 feet) or more, adding a striking presence to any landscape.

As a member of the Passifloraceae family, the blue passionflower stands out with its showy blue and white flowers. The blooms can sometimes be pink-flushed, and they feature a stunning ring of blue, white, and purple filaments.

In addition to its breathtaking flowers, the Passiflora caerulea also produces orange fruits, making it a visually appealing and multifaceted addition to any garden.

Although native to the tropics of South America, the blue passionflower can be hardy in various climates, such as most regions of the British Isles. It’s an evergreen plant with dark green leaves that prefers full sun to part shade and requires medium water and maintenance.

With the right conditions, Passiflora caerulea can become a focal point in your garden, displaying its exotic beauty for all to enjoy. In this guide, you’ll learn how to grow and nurture your own Passiflora Caerulea successfully. Let’s dive in!

Passiflora caerulea blooming with white and purple flower and green leaves

Photo Credit: Shutterstock.

Botanical Name: Passiflora caerulea

Common Name: Bluecrown Passionflower, Blue Passionflower, Common Passionflower, Flower of the Five Wounds, Passionflower, Southern Beauty, Wild Apricot

Family: Passifloraceae

Plant Type: Perennial, vine

Hardiness Zones: 7 – 10 (USDA)

Sun Exposure: Full, partial

Soil Type: Moist but well-drained

Soil pH: Neutral, acidic

Bloom Time: Summer

Flower Color: Purple, blue, pink, red, white

Native Area: North America, South America

Passiflora Caerulea Plant Care

Passion flower (Passiflora caerulea) is an exotic-looking perennial climber with evergreen, deeply lobed, glossy dark green leaves, from which large white flowers with purple, blue, and white filaments appear between July and September.

The 3 inch (8 cm) blooms are followed by orange fruits the size of eggs from late summer to fall. The fruits are edible, but have a flavor that vaguely resembles blackberry and can be used to make jams, jellies, and juices. The foliage consists of glossy, dark green, palmately lobed leaves with 5 to 7 lobes.

Passion Flower, which is indigenous to southern Brazil and Argentina, is evergreen in tropical climates but deciduous where winters are cool. This beautiful and exotic plant can add a touch of tropical flair to any garden or indoor space.

However, to ensure that your plant thrives and produces stunning blooms, it’s important to understand how to care for it properly. Here are some tips and tricks to keep your Passiflora Caerulea healthy and happy.

3 flower blooms of Passiflora Caerulea

Photo Credit: Shutterstock.


The Passiflora Caerulea requires full sun to partial shade to grow and thrive. If you’re planting your passionflower outside, make sure to use an area that gets at least six hours of sunlight a day. This will help your plant to produce more blooms and grow faster. For indoor plants, a south or west-facing window is ideal as it will provide enough sunlight for the plant to grow.

It’s important to note that while the Passiflora Caerulea loves sunlight, it’s also sensitive to intense heat and direct sunlight. If you live in a hot and dry climate, make sure to provide some shade for your plant during the hottest part of the day to prevent sunburn and heat stress.


The blue passionflower grows best in well-draining soil that is rich in nutrients. Make sure to add some sand or perlite to the potting mix to enhance drainage and prevent waterlogging.

The soil pH should be slightly acidic, between 6.0 and 6.5, for optimal growth. You can test your soil’s pH using a soil testing kit, which you can purchase at any gardening store.

When planting your Passiflora Caerulea, make sure to choose a pot that is slightly larger than the plant’s root ball. This will give your plant enough room to grow and prevent it from becoming root-bound.

You can also add some organic matter, such as compost or aged manure, to the soil to provide additional nutrients for your plant.


Watering is an essential part of Passiflora Caerulea care, and it’s important to keep the soil moist but not waterlogged.

Water your blue passionflower frequently during the growing season, especially during the hotter months when the soil tends to dry out faster. Make sure to reduce watering during the winter months, allowing the soil to dry out between watering.

It’s also important to note that the Passiflora Caerulea is sensitive to chlorine and other chemicals found in tap water. If possible, use filtered or rainwater to water your plant to prevent any damage to the leaves and roots.

Temperature and Humidity

The Passiflora Caerulea is a tropical plant and enjoys warm temperatures, ideally between 20°C to 30°C. It also prefers a humid environment, but make sure to keep the leaves dry to avoid fungal growth.

A wet Passion flower blossoming outside in a garden

Photo Credit: Dreamstime.

If you live in a dry climate, you can increase the humidity around your plant by placing a tray of water near it or by using a humidifier.

During the winter months, make sure to protect your Passiflora Caerulea from cold drafts and temperatures below 10°C. You can move your plant to a warmer location or cover it with a frost cloth to prevent any damage to the leaves and stems.


You can fertilize your passionflower every few weeks during the growing season with a balanced fertilizer. Make sure to follow the manufacturer’s instructions and avoid over-fertilizing, which can harm the plant.

You can also add some organic matter, such as compost or aged manure, to the soil to provide additional nutrients for your plant.

It’s important to note that the Passiflora Caerulea is sensitive to high levels of fertilizer salts, which can cause leaf burn and other issues. To prevent this, make sure to flush the soil with water every few months to remove any excess salts.

How to Grow Passiflora Caerulea from Seed

Orange fruits of Passiflora caerulea that contain seeds

Photo Credit: Shutterstock.

Growing the blue passionflower from seed is relatively simple and a cost-effective option. Here are the steps you need to follow:

  1. Soak the seeds in warm water for 24 to 48 hours. This will help to soften the hard seed coat and encourage faster germination.
  2. Fill a tray or a pot with well-draining soil. Passiflora caerulea prefers a slightly acidic soil with a pH between 6.0 and 6.5. You can use a mixture of peat moss, perlite and vermiculite to create a light and well-draining soil.
  3. Plant the seeds about half an inch deep in the soil. Make sure to space the seeds at least 2 inches apart to give them enough room to grow.
  4. Water the soil regularly to keep it moist. Use a spray bottle or a watering can with a fine nozzle to avoid disturbing the seeds. Passiflora caerulea requires consistent moisture to germinate and establish itself.
  5. Place the tray or pot in a warm spot with sufficient sunlight. Passiflora caerulea loves bright, indirect light and warm temperatures between 70°F and 85°F. You can place the tray or pot near a south-facing window or under grow lights to provide the necessary light.
  6. Once the seedlings have developed two or three sets of leaves, transplant them into larger pots. Passiflora caerulea grows quickly and needs plenty of room to spread its roots. You can use a mixture of potting soil, compost, and sand to create a nutrient-rich soil that drains well.

When growing Passiflora caerulea from seed, it is important to be patient and consistent. With the right care and attention, you can enjoy the beauty and benefits of this amazing plant for years to come.

How to Propagate Passiflora Caerulea

Purple passion spring flower or passiflora caerulea in good weather

Photo Credit: Shutterstock.

While it is possible to grow this plant from seeds, another way to propagate it is by using cuttings from a healthy mother plant. Here are some additional details to help you successfully propagate your own passiflora caerulea.

  1. Firstly, it is important to choose a healthy branch from the mother plant. Look for a branch that is at least 6 inches long and has a diameter of about 1/4 inch. The branch should be free from any signs of disease or damage.
  2. Next, using a clean pair of pruning shears, cut the branch into sections, making sure each section has at least two nodes. Nodes are the points on the branch where the leaves grow out. It is important to have at least two nodes on each section to ensure that the cutting will develop roots.
  3. After you have cut the branch into sections, remove the leaves from the bottom half of each cutting. This will help the cutting to focus its energy on developing roots instead of supporting the leaves.
  4. To promote root growth, dip the cut end of each branch in rooting hormone. Rooting hormone is a powder or liquid that contains plant hormones that stimulate root growth.
  5. After you have applied rooting hormone, plant the branch in well-draining soil. It is important to use soil that is well-draining to prevent the cutting from becoming waterlogged and developing root rot.
  6. Water the soil regularly to keep it moist, but avoid overwatering as this can also lead to root rot. Place the pot in a bright area, but avoid direct sunlight as this can scorch the leaves of the cutting.
  7. Once the roots develop, which can take several weeks, transplant the new plant into a bigger pot. This will give the plant more room to grow and thrive.

By following these simple steps, you can easily propagate your own passiflora caerulea and enjoy the beauty of this stunning plant in your own garden.

Potting and Repotting Passiflora Caerulea

As mentioned earlier, the blue passionflower prefers to be root bound, which means that it likes to have its roots confined to a small space. This is why you won’t need to repot it frequently. However, as the plant grows, you may need to move it to a bigger pot to accommodate its expanding root system.

When choosing a pot for your blue passionflower, make sure to select one that is one size bigger than the existing pot. This will give the plant enough room to grow without overwhelming it with too much space. Plus, make sure that the pot has proper drainage holes to prevent water from accumulating in the soil and causing root rot.

Before repotting your blue passionflower, prepare the new pot by filling it with fresh, well-draining soil. You can use a mixture of potting soil, perlite, and sand to create a light and airy soil that will promote healthy root growth.

When it’s time to repot your plant, carefully remove it from its existing pot, making sure not to damage the roots. You can do this by gently tapping the sides of the pot and loosening the soil around the edges. Once the plant is free, gently shake off any excess soil and inspect the roots for any signs of damage or disease.

Next, place the plant in the new pot and fill it with soil, making sure to cover the roots completely. You can gently press down on the soil to remove any air pockets and ensure that the plant is stable in its new home.

Finally, water the plant well and place it in a bright spot with sufficient sunlight. The blue passionflower loves bright, indirect light, so make sure to place it near a window or in a spot that receives at least 6 hours of sunlight per day.

Common Pests and Plant Diseases for Passiflora Caerulea

Passiflora Caerulea affected by pests

Photo Credit: Shutterstock.

While this plant is known for its hardiness, it can still be susceptible to a number of pests and plant diseases that can affect the plant’s health and appearance.

One of the most common pests that can plague Passiflora Caerulea is spider mites. These tiny pests can be difficult to see with the naked eye, but they can cause significant damage to the plant by sucking the sap from the leaves and stems.

To prevent spider mites, it’s important to keep the plant’s environment clean and well-maintained. Regularly dusting the leaves and keeping the plant away from other infested plants can also help.

Aphids are another common pest that can affect Passiflora Caerulea. These small, soft-bodied insects can be found on the undersides of leaves and can cause stunted growth and yellowing of the leaves.

To prevent aphids, it’s important to keep the plant well-watered and to avoid over-fertilizing. Natural predators such as ladybugs can also help to control aphid populations.

Fungal growth is another issue that can affect Passiflora Caerulea. This can be caused by a number of factors, including poor drainage and high humidity.

To prevent fungal growth, it’s important to ensure that the plant is properly watered and that excess water is allowed to drain away. Adequate air circulation can also help to prevent fungal growth.

Yellow leaves can also be a common issue with Passiflora Caerulea. This can be caused by overwatering or poor drainage, which can lead to root rot. To prevent yellow leaves, it’s important to ensure that the plant is not overwatered and that excess water is allowed to drain away. Adding a layer of mulch around the base of the plant can also help to retain moisture and prevent waterlogging.

If you do notice any of these issues with your Passiflora Caerulea, it’s important to take action quickly to prevent further damage. Using insecticides or fungicides sparingly and following the instructions carefully can help to combat these problems without harming your plant.


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