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Trollius × cultorum 'Superbus' AGM

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© RHS 2003

Characteristics

Plant type

Bog or Herbaceous Perennial

Habit

Clump-forming

Resilience

Hardiness

H7 (very hardy)

Colour

Flower

Yellow in Spring and Summer

Foliage

Green in Autumn, Spring and Summer

Size

Ultimate height

0.5-1 metres

Ultimate spread

0.1-0.5 metres

Time to ultimate height

2-5 years


Preferred common name

globeflower 'Superbus'

Family

Ranunculaceae


Trollius are herbaceous perennials which form a clump of palmately lobed leaves, with erect stems bearing solitary, yellow, globose or bowl-shaped flowers composed of several petal-like sepals surrounding much-reduced nectar-bearing petals

'Superbus' is a clump-forming herbaceous perennial to 60cm, with deeply divided basal leaves and long stems bearing globose, lemon-yellow flowers 5cm across

Synonym(s)

  • Trollius europaeus 'Superbus'

How to grow

Sunlight

  • Full sun
  • Part shade

Aspect

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

Cultivation

Grow in deep preferably heavy, moist soil that does not dry out, in full sun or partial shade. Cut back hard after flowering and apply a balanced liquid fertiliser to encourage further blooms.

Soil

  • Poorly-drained
  • Neutral, Acid or Alkaline
  • Loam or Clay

Propagation

Propagate by division in spring

Suggested planting locations and garden types

Cottage/Informal Garden, Flower borders and beds or Wildflower meadow


How to care

Pruning

Cut back hard after flowering

Pests

Generally pest free

Diseases

May be subject to powdery mildews