Clematis, Early Large-flowered Clematis 'Marie Boisselot'


Family: Ranunculaceae (ra-nun-kew-LAY-see-ee) (Info)
Genus: Clematis (KLEM-uh-tiss) (Info)
Cultivar: Marie Boisselot
Additional cultivar information:(aka Madame Le Coultre)
Hybridized by Boisselot
Registered or introduced: 1885
» View all varieties of Clematis


Early Large-flowered


8-10 ft. (2.4-3 m)


24-36 in. (60-90 cm)

36-48 in. (90-120 cm)


USDA Zone 5a: to -28.8 C (-20 F)

USDA Zone 5b: to -26.1 C (-15 F)

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)

Bloom Color:

White/Near White

Flower Fragrance:

No fragrance

Bloom Shape:



Bloom Diameter:

Large - 5 to 8 inches (12 to 20 cm)

Bloom Time:

Mid Summer

Late Summer/Early Fall

Sun Exposure:

Sun to Partial Shade

Other details:

Unknown - Tell us


All parts of plant are poisonous if ingested

Handling plant may cause skin irritation or allergic reaction

Pruning Groups:

Group 2 - Repeat bloomers; prune immediately after flowering

Group 3 - Summer/Fall bloomers; prune hard in early spring

Patent Information:


Propagation Methods:

From softwood cuttings

Seed Collecting:

N/A: plant does not set seed, flowers are sterile, or plants will not come true from seed

Foliage Color:

Unknown - Tell us

Bloom Characteristics:

Unknown - Tell us

Water Requirements:

Requires consistently moist soil; do not let dry out between waterings

Where to Grow:

Grow outdoors year-round


This plant has been said to grow in the following regions:


Gainesville, Florida

Chicago, Illinois

Lititz, Pennsylvania

Gardeners' Notes:


On Mar 7, 2016, coriaceous from ROSLINDALE, MA wrote:

Hardy to Z4a.

Blackened crispy leaves are often due to a common fungal disease called clematis wilt. Large-flowered clematis are more prone to clematis wilt than the species and small-flowered hybrids.

Clematis and tomatoes are two exceptions to the usual rule, and are best planted 6 inches deeper than the soil level in the pot. This protects the stem bases from mechanical damage, and helps prevent clematis wilt, whose fungus enters where there's damage. It also helps keep the roots cool.

Many small-flowered hybrids are spectacular in flower, and long-blooming. I consider them... read more


On Jun 21, 2012, annlouisekr from Laval Quebec,
Canada wrote:

We moved to Laval North 2 years ago and planted Marie Boisselot with other Clematis . It is so beautiful and flowers from June to late September early October which is rare for Quebec. I would like to purchase 2 more but can not find the plant here.


On Apr 22, 2011, KanapahaLEW from Alachua, FL (Zone 8b) wrote:

This is second year. Grew about 6 feet last year but no blooms. Cut to 1 foot late winter and is now up about 5 feet and has several beautiful huge (5" - 6") white blooms. Very impressive for a Clematis down here (Gainesville FL 8b/9a depending on who you talk to).


On Jun 17, 2008, northgrass from West Chazy, NY (Zone 4b) wrote:

Beautiful large pure white flowers on a vine that climbs up nicely on a trellis. It has more flowers and blooms more consistently than Henryi, it also has larger flowers. I would consider it one of the best whites, far surpassing both Henryi and Gillian Blades in my garden.


On May 7, 2007, acadia2431 from Lititz, PA wrote:

These blooms are so large and beautiful they look like gleaming white water lilies climbing up your trellis.


On Dec 11, 2005, wallaby1 from Lincoln,
United Kingdom (Zone 8a) wrote:

When this plant gets established it has the most beautiful flowers, but so far has not grown very tall in the 6 years I have had it. An occasional slightly heavier prune may encourage it. I purchased this as Madame le Coultre, syn. Marie Boisselot, and in most places you will find this is claimed.

However, as found on it is as follows:
'Marie Boisselot' is extremely similar to 'Mevrouw Le Coultre' which is sometimes (wrongly) listed as a synonym. Victoria Matthews, the International Clematis Registrar, notes that the anthers on 'Marie Boisselot' are completely yellow whilst on 'Madame Le Coultre' the connectives quickly go black at the tip.

On careful inspection of mine, in the absence of the black tips to the anthers I must assum... read more


On Jun 12, 2005, teatimer from Lavrica,
Slovenia (Zone 7a) wrote:

We've had a wild ride with this one. At the outset it was given to wilt and did so repeatedly inside the first two years. In its third year it became shielded by a Westerland bush; it might be that or it might be that it's simply a mature plant now - in any case it came back with a vengeance and is a big strong heavily flowering mass now.


On Jan 3, 2005, mystic from Ewing, KY (Zone 6a) wrote:

Awarded RHS Award of Garden Merit in 1993.