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Caltha Genus

Kingcup

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General Needs

  • LightFull sun
  • HardinessFrost hardy (min -5°C)
  • SoilWell drained
  • WaterMoist

Description

Caltha genus (Kingcup). This genus is of the Ranunculus family. There are about 10 species of moisture-loving, deciduous, perennials. Being marginal water plants they will occur in cold marshlands and alpine bogs of the cool-temperate zones of both hemispheres. They will spread by thick rhizomes and will often come into leaf and flower very early. The flowers are white or yellow and cup-shaped, and the leaves are kidney or heart-shaped leaves. They are fully hardy; the smaller growing species are suitable for rock gardens, troughs and alpine houses.

Characteristics

Perennials, Herbaceous or Aquatics

Other common names

Marsh marigold

Origin

Worldwide

Interest and use

Grown for their attractive flowers. Smaller growing species are suitable for rock gardens, troughs and alpine houses.

Cultivation

The plants will require moist and well drained soil, and the larger species are best in marginal conditions. Most will prefer an open sunny position.

Propagation

You can propagate the species by seeds or by division in the autumn or early spring, and selected forms by division in the autumn or early spring.

Pests, diseases or disorders

Powdery mildew.

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