Bluecrown passionflower
Passiflora caerulea · Passifloraceae
📷 K. Chaikovska (Kate Chkv) · CC BY 4.0
The gardener's calendar
Bluecrown passionflower is in full bloom: enjoy it, watch watering in hot weather and let spent flowers feed pollinators before pruning.
ID card
- Foliage
- Deciduous to semi-evergreen depending on climate
- Flowering
- June to September, spectacular blue flowers
- Mature size
- Up to 3 m in height
- Growth
- Fast and vigorous
- Hardiness
- Moderate (-5 to -8 °C)
- Origin
- South America (Brazil, Argentina)
- Soil type
- Well-drained, rich in organic matter
✓ Taxonomy verifiedSource: AI estimate · hardiness: reliability high.
Expert tips
The key tip
Passion flower needs solid support from planting onward: stems get heavy and snap if they have nothing to cling to. Use sturdy stakes, espalier, or a vertical trellis system.
The common mistake
People forget to stake it and the plant collapses on the ground or breaks at the base by year two—the damage is permanent and you'll need to replant.
The pro's trick
Hard prune every 2-3 years in March (cut back to 30-50 cm): it bounces back with doubled vigor and flowers way better than old, woody plants.
Care
Watering
Water regularly during the growing season, keeping the substrate moist but without waterlogging. Reduce watering in winter, especially if the plant goes dormant. In a pot, check that water doesn't stagnate at the bottom thanks to good drainage.
Light exposure
Place your passion flower in full sun, at least 6 hours per day, to get abundant flowering and intense colors. In partial shade, growth continues but flowering decreases. Protect from strong wind that could damage the stems.
Pruning and structure
Prune lightly after flowering to maintain shape and encourage branching. Remove dead or weak stems in late winter. Guide the main stems onto their support as soon as possible to form a beautiful shape.
Fertilizing
Apply a balanced or slightly potassium-rich fertilizer every 15 days during flowering (June to September). Reduce feeding in autumn and stop fertilizing in winter. Excess nitrogen promotes foliage at the expense of flowers.
Substrate and drainage
Use rich, aerated and well-drained potting soil, enriched with compost or peat. Slightly acidic to neutral pH is ideal. In a pot, make sure the container has drainage holes and a layer of clay balls at the bottom.
Pests and diseases
Watch out for spider mites and mealybugs, particularly indoors in dry conditions. Good ventilation and moderate humidity limit these risks. If attacked, increase leaf misting or use natural solutions. Excess moisture can promote root rot.
Did you know?
The blue passion flower owes its name to a symbolic resemblance: the complex and spectacular flowers were interpreted by Jesuit missionaries in the 16th century in South America as a representation of the Passion of Christ, hence the name 'passion flower'. This mystical association made the plant known in Europe well before its widespread ornamental cultivation.
Where to buy it
Best planted in autumn so the roots settle in before summer, or in early spring once the frost has passed. Pick a plant with healthy foliage and roots that are not exposed. Best time: March, October, November.
Add this plant to my garden →Plants from the same family
- Passion flowerPassiflora incarnata
- Passion fruitPassiflora edulis
- White passionflowerPassiflora subpeltata
- Passiflora foetidaPassiflora foetida
- Corkystem passionflowerPassiflora suberosa
- Yellow passionflowerPassiflora lutea
Tips generated and checked by Viridia — adapt them to your local climate.