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Centaurea jacea

Brown knapweed

Garden

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  • Centaurea jacea | Copyright Greenplantswap 2018

Features

  • BloomsJune to September
  • Height0.5m to 1.5m
  • Growth HabitStalked clump
  • Flower ColourPink-red
  • Leaf ColourMedium green

Description

Centaurea jacea (Brown knapweed). A perennial herb growing to 1.5cms. The leaves are variable but generally ovate. The purple or white florets are borne on clustered capitulums in summer.

Characteristics

Perennial, Herbaceous

Origin

Europe. Naturalized in Britain

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.

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  • Centaurea jacea | Copyright Greenplantswap 2018

Needs

  • LightFull sun
  • HardinessFully hardy (min -23°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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