TREES & plants

Blue passionflower (ANNUAL VINE)

The ornate flower of blue passionflower.

Blue passionflower is a tropical vine with beautiful, ornate flowers.  It is an annual vine in the Midwest, but will grow rapidly and produce flowers. 

This plant has some cultivated varieties. Go to list of cultivars.


Botanical name: 
Passiflora caerulea
All Common Names: 
Blue passionflower, blue passion vine
Family (English): 
Family (Botanic): 
Tree or Plant Type: 
  • Vine
Native Locale: 
  • Non-native
Landscape Uses: 
  • Container, 
  • Mixed border, 
  • Screen
Size Range: 
  • Large plant (more than 24 inches)
Light Exposure: 
  • Full sun (6 hrs direct light daily)
Hardiness Zones: 
  • Zone 8, 
  • Zone 9, 
  • Zone 10, 
  • Zone 11
Soil Preference: 
  • Moist, well-drained soil
Season of Interest: 
  • Mid summer, 
  • Late summer, 
  • Early fall
Flower Color & Fragrance: 
  • Blue
Shape or Form: 
  • Vining
Growth Rate: 
  • Fast
More Information: 

Size and Method of Climbing

Blue passionflower can grow up to 20 feet in one season.  It climbs by tendrils.  Vines with tendrils climb by twisting those tendrils around a support.  This type of vine grows well on trellises, arbors, wires or chain-link fences.

Plant Care

Full sun and well drained soil.

Disease, pests, and problems

No common serious problems.

Native geographic location and habitat

Native to South America.

Leaf description

The alternate leaves are deep green with 5 to 9 deep lobes.

Flower description

The blue and white flowers are very ornate and distinctive.

Fruit description

Fruit are not commonly produced.  They are egg-shaped, orange berries; 2 to 2.5 inches long.

Cultivars and their differences

Clear Sky blue pasionflower (Passiflora caerulea 'Clear Sky'):  A vigorous cultivar with light blue flowers that are slightly larger than those of the species.

Constance Eliott blue passionflower (Passiflora caerulea 'Constance Eliott'):  This cultivar has pure white flowers.



Passiflora caerulea or Blue passionflower (ANNUAL VINE)

We do not seem to have this in our living collection.