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Centaurea calcitrapa

Red star thistle

Garden

Wishlist

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Features

  • BloomsJuly to September
  • Height0.5m to 0.6m
  • Growth HabitStalked clump
  • Flower ColourPale purple
  • Leaf ColourGrey-green

Description

Centaurea calcitrapa (Red star thistle). An upright biennial from Europe with grey-green leaves. Bears pale purple flowers in mid summer.

Characteristics

Biennial, Shrub or Herbaceous

Origin

Europe

Interest and use

Found on waste ground.

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Needs

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

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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