Jackman's Clematis Clematis x jackmanii
- Phonetic Spelling
- KLEM-ah-tiss jak-MAN-ee-eye
- This plant has high severity poison characteristics.
- See below
- Description
-
Jackman’s clematis is a woody, deciduous, twining, perennial climber in the buttercup family (Ranunculaceae). It is a hybrid of Clematis languinosa and Clematis viticella, introduced in 1858 by English horticulturalist George Jackman, for whom the epithet honors. Many cultivars have been selected from this cross.
Jackman’s clematis requires full sun to partial shade and clay, loam, or sandy, moist soil with good drainage and a neutral pH. Clematis prefer to have their roots shaded so mulch or over plant with other perennials. Prune in late winter or early spring before new growth emerges (Type 2).
This plant presents a long period of interest. First, large, showy, abundant flowers bloom in summer and sporadically until frost. The bloom yields a coppery brown, plumose seed head that resembles a sea anemone.
Use Jackman’s clematis where it can grow vertically such as on a rock wall, a patio trellis, or trees and shrubs in a woodland area. Because it can rapidly reach 10 to 15 feet high and 3 to 6 feet wide, it is often chosen for areas where screening or privacy are needed. It provides beautiful flowers and is an excellent choice for an English garden or a cottage garden. It is resistant to deer and rabbit foraging and tolerates growing under black walnut.
Insects, Diseases and Other Plant Problems: No significant problems.
VIDEO Created by Elisabeth Meyer for "Annuals, Perennials, Vines, and Groundcovers" a plant identification course offered in partnership with Longwood Gardens.
- Profile Video:
- 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'
- 'Blekitny Aniol' aka 'Blue Angel', 'Comtesse de Bouchaud', 'Dominika', 'Jackmanii Alba'
- Tags:
- 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'
- 'Blekitny Aniol' aka 'Blue Angel', 'Comtesse de Bouchaud', 'Dominika', 'Jackmanii Alba'
- Tags:
-
-
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:
- Perennial
- 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:
- 4a, 4b, 5a, 5b, 6a, 6b, 7a, 7b, 8a, 8b, 9a, 9b
-
-
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 at maturity.
-
-
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 inches 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 inches.
-
-
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:
- Children's Garden
- Cottage Garden
- English Garden
- Design Feature:
- Screen/Privacy
- Attracts:
- Bees
- Butterflies
- Hummingbirds
- Resistance To Challenges:
- Black Walnut
- Deer
- Rabbits
- Problems:
- Contact Dermatitis
- 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
