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Herbaceous Perennial

Clematis integrifolia 'Blue Ribbons' (I)

Deciduous, clump-forming herbaceous (non-climbing) clematis, to about 50cm high, with elliptic green leaves. Widely bell-shaped, deep violet-blue flowers are held on slender stems above the foliage from midsummer to early autumn, and are followed by feathery, silvery seedheads

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Ultimate height

0.1–0.5 metres

Time to ultimate height

2–5 years

Ultimate spread

0.1–0.5 metres

Chalk

Clay

Loam

Sand

Moisture

Moist but well–drained, Well–drained

pH

Acid, Alkaline, Neutral

	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Full sun

Aspect

South–facing or West–facing

Exposure

Exposed or Sheltered

Hardiness
Hardiness ratings
All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets
H1a: under glass all year (>15C)
H1b: can be grown outside in the summer (10 - 15)
H1c: can be grown outside in the summer (5 - 10)
H2: tolerant of low temperatures, but not surviving being frozen (1 to 5)
H3: hardy in coastal and relatively mild parts of the UK (-5 to 1)
H4: hardy through most of the UK (-10 to -5)
H5: hardy in most places throughout the UK even in severe winters (-15 to -10)
H6: hardy in all of UK and northern Europe (-20 to -15)
H7: hardy in the severest European continental climates (< -20)

Botanical details

Family: Ranunculaceae
Native to the UK: No
Foliage: Deciduous
Habit: Clump forming, Bushy
Potentially harmful: Skin irritant. Wear gloves and other protective equipment when handling. Pets (rabbits): Harmful if eaten. For further information and contact numbers regarding pets, see the HTA guide to potentially harmful plants
Genus: Clematis can be deciduous or evergreen shrubs or herbaceous perennials, mostly climbing by twining leaf-stalks, and often with showy flowers. Some have attractive fluffy seedheads in autumn
Name status: Unresolved
Horticultural Group: Integrifolia Group clematis are woody-based subshrubs with non-climbing or semi-climbing herbaceous stems, and bell-shaped or flat flowers on the current year's growth, in summer and early autumn

How to grow

Cultivation

Plant herbaceous (non-climbing) clematis at soil level in moisture-retentive, well-drained soil in full sun, with the roots and base of the plant in shade. See clematis cultivation

Propagation

Propagate by division or take basal softwood cuttings of herbaceous clematis in spring

Suggested planting locations and garden types

City and courtyard gardens
Cottage and informal garden
Flower borders and beds
Underplanting of roses and shrubs

Pruning

See clematis pruning: group three

Pests

May be susceptible to aphids. Cutworms and voles may cut young stems

Diseases

May be susceptible to honey fungus (rarely), clematis wilt and clematis slime flux

Get involved

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