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Herbaceous Perennial

Clematis × diversifolia 'Hendersonii' (I)

clematis 'Hendersonii'

Deciduous, clump-forming herbaceous (non-climbing) clematis about 2-2.5m tall, with green leaves and slender stems topped by lightly scented, widely bell-shaped, deep bluish-purple flowers to 6.5cm across, with slightly twisted outer sepals surrounding yellow anthers, flowering from midsummer to early autumn

Synonyms

Clematis × eriostemon 'Hendersonii'
Clematis integrifolia 'Hendersonii' Koch
see moreClematis hendersonii Koch
Clematis hendersonii (of Henderson)

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Ultimate height

1.5–2.5 metres

Time to ultimate height

2–5 years

Ultimate spread

1–1.5 metres

Chalk

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 GB / Ireland: No
Foliage: Deciduous
Habit: Clump forming
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: Accepted
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. Plant in full sun for the best scent. Ideal for growing through plants in the herbaceous border or through low shrubs for support. See clematis cultivation

Propagation

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

Suggested planting locations and garden types

Cottage and informal garden
Coastal
Cut flowers
Flower borders and beds

Pruning

Pruning (clematis) group 3

Pests

May be susceptible to aphids, snails and caterpillars; petals may be eaten by earwigs

Diseases

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

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