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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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