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Climber Wall Shrub

Clematis macropetala 'Lagoon' Jackman 1959 (A/d)
  • RHS AGM

clematis 'Lagoon'

A slender deciduous climber with deep violet-blue flowers to 7.5cm across in spring and early summer

Synonyms
Clematis macropetala 'Blue Lagoon'
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Size
Ultimate height
1.5–2.5 metres
Time to ultimate height
5–10 years
Ultimate spread
1–1.5 metres
Growing conditions
Chalk
Clay
Loam
Sand
Moisture
Moist but well–drained
pH
Acid, Alkaline, Neutral
Colour & scent
StemFlowerFoliageFruit
Spring Blue Purple Green
Summer Blue Purple Green
Autumn
Winter
Position
  • Full sun
  • Partial shade
Aspect

South–facing or East–facing

Exposure
Exposed or Sheltered
Hardiness
H6
Botanical details
Family
Ranunculaceae
Native to the UK
No
Foliage
Deciduous
Habit
Climbing
Potentially harmful
Skin irritant. Wear gloves and other protective equipment when handling
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
Atragene Group Clematis consists of woody climbers with deciduous, 1 to 2-ternate leaves and nodding, bell-shaped, single or double flowers to 10cm across, on old wood in spring and early summer, occasionally also later, on current year's growth

How to grow

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. Can be grown in containers at least 45cm (18in) deep and wide in a soil based potting compost. See clematis cultivation for more advice

Propagation

Propagate by layering or semi-hardwood cuttings

Suggested planting locations and garden types
  • City and courtyard gardens
  • Cottage and informal garden
  • Flower borders and beds
  • Wall side borders
Pruning

Clematis pruning: group one

Pests

May be susceptible to aphid damage on young plants

Diseases

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

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