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Clematis x jackmanii

Common Name(s):

Phonetic Spelling
KLEM-ah-tiss jak-MAN-ee-eye
This plant has high severity poison characteristics.
See below
Description

Clematis x Jackmanii is a hybrid of  Clematis languinosa and Clematis viticella, introduced by (and named after) English nurseryman George Jackman from 1858 - 1862.

Clematis x Jackmanii grows rapidly, with purple-violet flowers which bloom in summer and reblooms sporadically until frost. It climbs by twining leaves on various supports such as walls, trees, shrubs, evergreens, trellis, mailboxes, etc. or can be left unsupported to sprawl as a ground cover. The blooms yield in Fall to interesting small, dry seedheads with a silky, plumose tail that resemble a sea anemone.

Clematis grow best with 'heads in the sun, feet in the shade'. Roots should be protected by mulch or overplanting with other perennials. Prune in late winter or early spring before new growth emerges.

 

VIDEO Created by Elisabeth Meyer for "Annuals, Perennials, Vines, and Groundcovers" a plant identification course offered in partnership with Longwood Gardens. 

 

 

 

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See this plant in the following landscape:
Cultivars / Varieties:
  • 'Blekitny Aniol' aka 'Blue Angel'
    Lavender-blue flowers with lighter central bar, yellow stamens
  • 'Comtesse de Bouchaud'
    Pink flowers produced in large quantities
  • 'Dominika'
    Ruffled deep mauve flower conspicuously veined over a two-tone light and dark mauve base
  • 'Jackmanii Alba'
    Large white flowers with slight pink/blue tinge
'Blekitny Aniol' aka 'Blue Angel', 'Comtesse de Bouchaud', 'Dominika', 'Jackmanii Alba'
Tags:
#purple#sun#showy flowers#deciduous#poisonous#partial shade#container plant#easy to grow#cut flowers#seedheads#cottage garden#rabbit resistant#trellis#fence#repeat bloom#moist soil#fast growing#privacy#well-drained soil#summer flowers#deer resistant#arbors#vigorous vine#climber#victorian garden#exotic looking#pollinator plant#fantz#vertical spaces#garden walls#problem for cats#problem for dogs#problem for horses#woodlands
 
Cultivars / Varieties:
  • 'Blekitny Aniol' aka 'Blue Angel'
    Lavender-blue flowers with lighter central bar, yellow stamens
  • 'Comtesse de Bouchaud'
    Pink flowers produced in large quantities
  • 'Dominika'
    Ruffled deep mauve flower conspicuously veined over a two-tone light and dark mauve base
  • 'Jackmanii Alba'
    Large white flowers with slight pink/blue tinge
'Blekitny Aniol' aka 'Blue Angel', 'Comtesse de Bouchaud', 'Dominika', 'Jackmanii Alba'
Tags:
#purple#sun#showy flowers#deciduous#poisonous#partial shade#container plant#easy to grow#cut flowers#seedheads#cottage garden#rabbit resistant#trellis#fence#repeat bloom#moist soil#fast growing#privacy#well-drained soil#summer flowers#deer resistant#arbors#vigorous vine#climber#victorian garden#exotic looking#pollinator plant#fantz#vertical spaces#garden walls#problem for cats#problem for dogs#problem for horses#woodlands
  • Attributes:
    Genus:
    Clematis
    Family:
    Ranunculaceae
    Life Cycle:
    Perennial
    Woody
    Recommended Propagation Strategy:
    Stem Cutting
    Country Or Region Of Origin:
    English hybrid
    Climbing Method:
    Twining
    Dimensions:
    Height: 10 ft. 0 in. - 15 ft. 0 in.
    Width: 3 ft. 0 in. - 6 ft. 0 in.
  • Whole Plant Traits:
    Plant Type:
    Poisonous
    Vine
    Woody Plant Leaf Characteristics:
    Deciduous
    Habit/Form:
    Climbing
    Growth Rate:
    Rapid
    Maintenance:
    Medium
    Texture:
    Coarse
  • Cultural Conditions:
    Light:
    Full sun (6 or more hours of direct sunlight a day)
    Partial Shade (Direct sunlight only part of the day, 2-6 hours)
    Soil Texture:
    Clay
    Loam (Silt)
    Sand
    Soil pH:
    Neutral (6.0-8.0)
    Soil Drainage:
    Good Drainage
    Moist
    Available Space To Plant:
    3 feet-6 feet
    NC Region:
    Coastal
    Mountains
    Piedmont
    USDA Plant Hardiness Zone:
    4b, 4a, 5b, 5a, 6a, 6b, 7b, 7a, 8b, 8a, 9b, 9a
  • Fruit:
    Fruit Color:
    Brown/Copper
    Fruit Value To Gardener:
    Showy
    Display/Harvest Time:
    Fall
    Fruit Type:
    Achene
    Fruit Description:
    In clusters, each fruit an achene, with long, persistent, plumed style, with expanding hairs as dissemination nears.
  • Flowers:
    Flower Color:
    Blue
    Pink
    Purple/Lavender
    Red/Burgundy
    Flower Inflorescence:
    Cyme
    Flower Value To Gardener:
    Good Cut
    Long Bloom Season
    Showy
    Flower Bloom Time:
    Summer
    Flower Shape:
    Star
    Flower Petals:
    4-5 petals/rays
    6 petals/rays
    Colored Sepals
    Flower Size:
    3-6 inches
    Flower Description:
    Abundant 5-7" in diameter, open, four-sepaled (occasionally 5 or 6), violet-purple flowers
  • Leaves:
    Woody Plant Leaf Characteristics:
    Deciduous
    Leaf Color:
    Green
    Leaf Type:
    Compound (Pinnately , Bipinnately, Palmately)
    Leaf Arrangement:
    Opposite
    Leaf Shape:
    Cordate
    Obovate
    Ovate
    Leaf Margin:
    Entire
    Hairs Present:
    No
    Leaf Length:
    1-3 inches
    Leaf Width:
    1-3 inches
    Leaf Description:
    Opposite, pinnately compound, 2-4.5" long, upper leaves often reduced to terminal leaflet and appear simple; leaflets commonly 3, ovate, acute, cordate, entire, glabrous and deep green above, usually paler and pubescent beneath, to 4.5".
  • Stem:
    Stem Color:
    Brown/Copper
    Red/Burgundy
    Stem Is Aromatic:
    No
    Stem Description:
    Slender, light reddish-brown or grey-brown, with 6 prominent ridges; pith star-shaped or angular, white, continuous.
  • Landscape:
    Landscape Location:
    Container
    Patio
    Rock Wall
    Vertical Spaces
    Woodland
    Landscape Theme:
    Cottage Garden
    Cutting Garden
    Pollinator Garden
    Design Feature:
    Screen/Privacy
    Attracts:
    Bees
    Butterflies
    Hummingbirds
    Resistance To Challenges:
    Black Walnut
    Deer
    Rabbits
    Problems:
    Poisonous to Humans
    Problem for Cats
    Problem for Children
    Problem for Dogs
    Problem for Horses
  • Poisonous to Humans:
    Poison Severity:
    High
    Poison Symptoms:
    CAUSES SEVERE PAIN IN THE MOUTH IF EATEN! SKIN IRRITATION MINOR OR LASTING ONLY FOR A FEW MINUTES.Burning sensation of mouth and mouth ulcers; skin redness and burning sensation, salivation, vomiting, diarrhea. Dermatitis, ingestion, inhalation
    Poison Toxic Principle:
    protoanemonin
    Causes Contact Dermatitis:
    Yes
    Poison Part:
    Flowers
    Fruits
    Leaves
    Roots
    Sap/Juice
    Seeds
    Stems