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Delphinium Genus

Delphinium

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General Needs

  • LightFull sun
  • HardinessHalf hardy (min 0°C)
  • SoilWell drained, Fertile, Rich
  • Soil pH6.0 to 7.0
  • WaterSemi-moist

Description

Delphinium genus. This genus has 250 or so species of perennials and annuals. They range from attractive self-seeding annuals to dwarf alpine plants that can exceed 2.4m in height. They nearly all start growth as a tuft of long-stalked basal leaves, with blades divided into 3 to 7 radiating lobes or segments. The tufts will elongate into upright, usually branched flowering stems which bear stalked 5-petalled flowers each with a backward-pointing nectar spur.

Characteristics

Annuals, Perennials or Biennials, Fragrants

Other common names

Larkspur

Interest and use

Grown for their spikes of irregularly cup-shaped, sometimes hooded, spurred flowers.

Cultivation

They are fully to half hardy and will need an open, sunny position with fertile or rich, well drained soil. In spring remove thin growths from well established plants, leaving 5-7 strong shoots. If flower spikes are removed after they fade, a second flush may be produced in late summer provided plants are fed and watered well.

Propagation

Propagate D.elatum hybrids by basal cuttings only.

Pests, diseases or disorders

Discomfort if ingested. Plant may also irritate the skin. Susceptible to slugs, snails and powdery mildew.

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