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Clematis 'Praecox' (H) AGM

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© RHS 2001

Characteristics

Plant type

Climber/Wall Shrub

Habit

Climbing

Resilience

Hardiness

H6 (hardy - very cold winter)

Colour

Flower

Pale Blue in Autumn

Foliage

Green in Autumn, Spring and Summer

Size

Ultimate height

2.5-4 metres

Ultimate spread

1.5-2.5 metres

Time to ultimate height

2-5 years


Preferred common name

clematis 'Praecox'

Family

Ranunculaceae


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 seed-heads in autumn

Heracleifolia Group consists of deciduous, woody-based sub-shrubs with erect or climbing stems, sometimes herbaceous, ternate or pinnate leaves, and narrowly bell-shaped or starry flowers on the current year's growth in summer and autumn

'Praecox' is a deciduous herbaceous sub-shrub with long scrambling stems bearing pinnate, strongly toothed leaves. Abundant, 2cm in width flowers with four recurved, pale milky-blue sepals from midsummer to early autumn

How to grow

Sunlight

  • Full sun

Aspect

  • South-facing, West-facing, North-facing or East-facing
  • Sheltered or Exposed

Cultivation

Plant in a moisture-retentive, well-drained soil. Keep the base of the plant and roots cool and shaded by other plants or a layer of pebbles or flat stones at the base. Plant with the crown of the clematis at soil level. Mulch in late winter with garden compost or well-rotted manure, avoiding the immediate crown. Ideal for a border where it can be supported by other plants or useful groundcover and for trailing over walls

Soil

  • Moist but well-drained
  • Alkaline or Neutral
  • Chalk, Clay, Sand or Loam

Propagation

Propagate by layering, division or basal stem cuttings

Suggested planting locations and garden types

Wall-side Borders or Patio/Container Plants


How to care

Pests

Young shoots may be troubled by aphids and caterpillars; petals can be eaten by earwigs

Diseases

May suffer from clematis slime flux