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Eryngium planum 'Blaukappe'

Sea holly

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Key information

Plant type

Hardy perennial

Flower colour



Attractive seed-heads, Flowers



Skill level


photo by Paul Debois, copyright GAP Photos (47405)

Plant details

This attractive sea holly forms clumps of evergreen, soft, deep green heart-shaped leaves. In early summer, the thin wirey stems emerge, set with spiny leaves. The branch stems carry a profusion of small, sea holly flowers in bright, steely blue. This tall sea holly is perfect for the back of a sunny border. Avoid cutting back the dead flower heads, as they provide interest during the winter months.

Family: Apiaceae

Genus: Eryngium

Species: planum

Cultivar: Blaukappe

Plant type: Hardy perennial

Flower colour: Blue

Foliage colour: Dark green

Feature: Attractive seed-heads, Flowers

Sun exposure: Full sun

Soil: Well-drained/light, Moist, Sandy

Hardiness: Hardy

Skill level: Beginner

Height: 90cm

Spread: 45cm

Time to plant seeds: September to October

Time to divide plants: March to March

Flowering period: July to September

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