Eryngium agavifolium

Sea holly

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Key information

Plant type

Hardy perennial

Flower colour



Flowers, Dramatic foliage


Half hardy

Skill level


photo by Carole Drake, copyright GAP Photos (57510)

Plant details

The sea holly is a bold evergreen with an upright stem topped by greenish-white late summer flowers high above wide, spine edged, deep green leaves at the base. It thrives in well-drained soil, prefers full sun and hates having its roots locked in wet winter soil. Keep away from a border edge where the sharp spines might scratch passers-by.

Family: Apiaceae

Genus: Eryngium

Species: agavifolium

Plant type: Hardy perennial

Flower colour: Green

Foliage colour: Dark green

Feature: Flowers, Dramatic foliage

Sun exposure: Full sun

Soil: Well-drained/light, Moist

Hardiness: Half hardy

Skill level: Beginner

Height: 120cm

Spread: 60cm

Time to divide plants: April to April

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