Passiflora, Hardy Passion Flower, Passion Vine 'Constance Elliott'

Passiflora caerulea

Family: Passifloraceae (pas-ih-flor-AY-see-ee) (Info)
Genus: Passiflora (pass-iff-FLOR-uh) (Info)
Species: caerulea (see-ROO-lee-uh) (Info)
Cultivar: Constance Elliott


Vines and Climbers

Water Requirements:

Average Water Needs; Water regularly; do not overwater

Sun Exposure:

Full Sun




Foliage Color:

Unknown - Tell us


over 40 ft. (12 m)


6-8 ft. (1.8-2.4 m)


USDA Zone 6a: to -23.3 C (-10 F)

USDA Zone 6b: to -20.5 C (-5 F)

USDA Zone 7a: to -17.7 C (0 F)

USDA Zone 7b: to -14.9 C (5 F)

USDA Zone 8a: to -12.2 C (10 F)

USDA Zone 8b: to -9.4 C (15 F)

USDA Zone 9a: to -6.6 C (20 F)

USDA Zone 9b: to -3.8 C (25 F)

USDA Zone 10a: to -1.1 C (30 F)

USDA Zone 10b: to 1.7 C (35 F)

Where to Grow:

Grow outdoors year-round in hardiness zone


Parts of plant are poisonous if ingested

Bloom Color:

White/Near White

Bloom Characteristics:

This plant is attractive to bees, butterflies and/or birds

Flowers are fragrant

Bloom Size:

Unknown - Tell us

Bloom Time:

Mid Summer

Late Summer/Early Fall

Mid Fall

Other details:

Unknown - Tell us

Soil pH requirements:

6.1 to 6.5 (mildly acidic)

6.6 to 7.5 (neutral)

Patent Information:

Unknown - Tell us

Propagation Methods:

From woody stem cuttings

From softwood cuttings

From semi-hardwood cuttings

From seed; direct sow outdoors in fall

From seed; winter sow in vented containers, coldframe or unheated greenhouse

Seed Collecting:

Allow unblemished fruit to ripen; clean and dry seeds

Unblemished fruit must be significantly overripe before harvesting seed; clean and dry seeds


This plant is said to grow outdoors in the following regions:

Mesa, Arizona

Queen Creek, Arizona

Tucson, Arizona

Ashland, California

Clayton, California

San Francisco, California

Williston, Florida

Eskridge, Kansas

Latonia, Kentucky

Roswell, New Mexico

Matthews, North Carolina

Lafayette, Tennessee

Austin, Texas

Dallas, Texas

Mc Kinney, Texas

show all

Gardeners' Notes:


On Mar 12, 2009, chuck7701 from McKinney, TX (Zone 8a) wrote:

This is a very cold hardy variety - has survived snow, ice and long low sustained freezing temps teens and 20's for several days with no freeze damage to limbs. Unlike my other passion vines which fade at the first hard frost or before. Agree on trimming back in late fall or Feb-Mar to promote flowers on new growth. Lots of white flowers, little to no fragrance, unlike the incensa variety.

Does spread via underground roots into other areas easily. Suggest placing on its own fence away from your permanent beds. I routinely pull new sprouts in my beds 10-15 feet from base.


On Aug 8, 2004, jftonk from Dallas, TX wrote:

I planted one of these on a west-facing fence in the spring of 2003 in Dallas, TX. The plant endured a freakishly heavy snow in the winter of 2004 and has not only survived, but flourished and now covers over 50% of a 32 ft long fence. it has produced absolutely tons of flowers and to my surprise, it has started to produce fruit. i planted a cerulean this year and next year I hope to have a fence entirely covered in the white and blue flowers.


On Jun 30, 2004, foodiesleuth from Honomu, HI (Zone 11) wrote:

I have never seen this one. Does it produce fruit?


On Jun 29, 2004, saya from Heerlen,
Netherlands (Zone 8b) wrote:

I have Constance in my garden for four years now growing on a southfacing wall near to my terrace. Every year it gives me countless flowers which are lovely perfumed too. The flowers grow on first year in spring I give her a good trim. She appeared hardy enough for me and has survived a harsh winter 2002/2003 with temps down to - 18 C
Well..I don't know any other flower that sticks so nicely on my has such a very interesting shape.