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Eryngium giganteum

Giant sea holly

Garden

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  • Eryngium giganteum | Copyright Greenplantswap 2017
  • Eryngium giganteum | Copyright Greenplantswap 2017

Features

  • BloomsJuly to August
  • Height0.6m to 1m
  • Spread0.2m to 0.35m
  • Growth HabitRosette
  • Flower ColourSilver blue
  • Leaf ColourSilver-blue
  • AwardsRHS Garden Merit

Description

Eryngium giganteum (Giant sea holly). A rosette biennial from Iran producing silver-blue thistles with heart-shaped leaves.

Characteristics

Biennial, Deciduous or Evergreen, Herbaceous

Origin

Iran

Interest and use

Grown for their flowers, foliage and habit. Suitable for coastal conditions.

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  • Eryngium giganteum | Copyright Greenplantswap 2017
  • Eryngium giganteum | Copyright Greenplantswap 2017

Needs

  • LightFull sun
  • HardinessFully hardy (min -15°C)
  • SoilWell drained, Fertile
  • WaterDry

Cultivation

They are fully to half hardy. Grow in sun with fertile well drained soil.

Propagation

You can propagate species by seeds in the autumn, or selected forms by division in the spring or by root cuttings in winter.

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