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Clematis 'Bill MacKenzie' (Ta) AGM

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© RHS 1999

Characteristics

Plant type

Climber/Wall Shrub

Habit

Climbing

Resilience

Hardiness

H6 (hardy - very cold winter)

Colour

Flower

Yellow in Autumn and Summer

Foliage

Green in Autumn, Spring and Summer

Fruit

Pale Grey/Silver in Autumn

Size

Ultimate height

4-8 metres

Ultimate spread

2.5-4 metres

Time to ultimate height

2-5 years


Preferred common name

clematis 'Bill MacKenzie'

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

Tangutica Group consists of deciduous climbers with ternate or pinnate leaves and small, bell- or star-shaped flowers appearing on the current year's growth in summer and early autumn

'Bill MacKenzie' is a large, vigorous deciduous climber with finely-cut leaves. Flowers 6-7cm in width with four thick, spreading bright yellow sepals surrounding dark stamens from early to late summer. Good silky seed-heads

Synonym(s)

  • Clematis orientalis 'Bill MacKenzie'
  • Clematis tangutica 'Bill MacKenzie'

How to grow

Sunlight

  • Full sun
  • Part shade

Aspect

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

Cultivation

Plant in a moisture-retentive, well-drained soil, with the roots and base of the plant kept cool and shaded by other plants or a layer of pebbles at the base. Plant with the crown 5–8cm (2–3in) deep to encourage new shoots to grow from below ground level

Soil

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

Propagation

Propagate by layering or semi-hardwood cuttings

Suggested planting locations and garden types

Wall-side Borders or Cottage/Informal Garden


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