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Centaurea Genus

Cornflower

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General Needs

  • LightFull sun
  • HardinessFrost tender (min 5°C)
  • SoilWell drained, Poor quality
  • Soil pH5.0 to 6.0
  • WaterSemi-moist

Description

Centaurea genus (Cornflower). This genus consists of annuals and perennials, with about 500 species. Some of the species are weeds, but many are desirable plants and they will grow in various colours.

Characteristics

Annuals, Perennials or Biennials, Shrubs or Herbaceous

Other common names

Hardheads, Knapweed

Origin

Europe, Med, Asia, Australia

Interest and use

Grown for the flower heads that each have a thistle like centre surrounded by a ring of slender ray petals. Suitable for coastal conditions.

Cultivation

They are fully hardy and will require sun, and will grow in any well drained soil, even poor soil.

Propagation

You can propagate by seeds or division in the autumn or spring.

Pests, diseases or disorders

Powdery mildew may be problem.

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