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Caltha palustris

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© RHS 1971

Characteristics

Plant type

Herbaceous Perennial, Aquatic or Bog

Habit

Clump-forming

Resilience

Hardiness

H7 (very hardy)

Colour

Flower

Dark Yellow in Spring

Foliage

Green in Autumn, Spring and Summer

Size

Ultimate height

0.1-0.5 metres

Ultimate spread

0.1-0.5 metres

Time to ultimate height

2-5 years


Preferred common name

marsh marigold

Family

Ranunculaceae


Caltha are rhizomatous herbaceous perennials with simple, usually heart-shaped leaves and cup-shaped yellow or white flowers in early spring

C. palustris is a rhizomatous herbaceous perennial to 50cm, with rounded, rich green leaves and clusters of deep yellow flowers 4cm in width

Other common names

  • boots
  • brave bassinets
  • bull flower
  • cow lily
  • crazy Beth
  • crowfoot
  • drunkards
  • goldes
  • goldings
  • golds
  • gools
  • horse blob
  • kingcup
  • mare blob
  • marybuds
  • May blob
  • meadow buttercup
  • meadow cowslip
  • meadow gowan
  • meadow-bright
  • publican's cloak
  • publicans-and-sinners
  • soldier's buttons
  • water boots
  • water buttercup
  • water cowslip
  • water dragon
  • water goggles
  • water gowan
  • yellow gowan

Synonym(s)

  • Caltha cornuta

How to grow

Sunlight

  • Full sun

Aspect

  • South-facing or West-facing
  • Exposed

Cultivation

Grow in an open site in rich boggy soil at the water's edge in full sun

Soil

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

Propagation

Propagate by seed sown as soon as ripe or by division in late summer or early spring

Suggested planting locations and garden types

Low Maintenance or Wildlife Gardens


How to care

Pruning

Cut back after flowering

Pests

Generally pest free

Diseases

Powdery mildews may be a problem