Late, Large-flowered Clematis 'Lady Betty Balfour'


Family: Ranunculaceae (ra-nun-kew-LAY-see-ee) (Info)
Genus: Clematis (KLEM-uh-tiss) (Info)
Cultivar: Lady Betty Balfour
Additional cultivar information:(aka Lady Balfour)
Hybridized by Jackman
Registered or introduced: 1910
» View all varieties of Clematis




8-10 ft. (2.4-3 m)


15-18 in. (38-45 cm)

18-24 in. (45-60 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)

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

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

Bloom Color:


Dark Purple/Black

Flower Fragrance:

No fragrance

Bloom Shape:


Bloom Diameter:

Medium - 2 to 5 inches (5 to 12 cm)

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

Bloom Time:

Late Summer/Early Fall

Mid Fall

Late Fall/Early Winter

Sun Exposure:

Full Sun

Sun to Partial Shade

Other details:

Unknown - Tell us


Unknown - Tell us

Pruning Groups:

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

Patent Information:

Unknown - Tell us

Propagation Methods:

From softwood cuttings

From semi-hardwood 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:

Average Water Needs; Water regularly; do not overwater

Where to Grow:

Unknown - Tell us


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

Grand Junction, Colorado

Mason, Michigan

Willis, Texas

Gardeners' Notes:


On Jun 24, 2006, ineedacupoftea from Denver, CO wrote:

Note that this comment is not arbitrary, but in relation to many other varieties of Clematis:
I have observed this hybrid in the collection of "loamy_lady." I am completely shocked by the longevity of its flowers, which have good substance and are stongly up-facing, with white bars on teh under-surface. The flowers are also in a position where they receive a great deal of sun and reflected radiation and heat, but still manage to individually last for weeks. A robust and vigorous plant to boot, this has to be one of the great Clematis hybrids.


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

Grown by George Jackman and Son in England. Named after a patron of his nursery. Awarded RHS Award of Merit.