Eryngium giganteum ‘Silver Ghost' (also called Sea Holly)
Also known as Sea Holly. Rosette forming herbaceous perennial with very spiny bracts. Very attractive to bees, butterflies and moths.
Summer and autumn. Seed heads can be left on over winter for birds to forage.
Habit – upright and stiff. H: 90cm S: 30cm.
Stems – round, stiff, pale grey-green.
Leaves – rosette of large, oval, green leaves. In the second year it produces spiny-edged, petiole-free leaves with spines at regular intervals up the stem.
Flowers – tiny blue flowers borne on a cone-shaped head, surrounded by spiny bracts.
Dry, well-drained, poor to moderately fertile soil. The plant is drought tolerant.
Lift and divide congested clumps in spring. Leave seed heads for wild birds to forage and for winter interest.
Divide clumps in spring. Will also self-seed. Dig up and replant self-seeded plants early as the plant is tap-rooted and resents disturbance.
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