Sea holly

Eryngium bourgatii 'Picos Amethyst'

Sea holly - Eryngium bourgatii  'Picos Amethyst'

Common Name: Sea holly
Genus: Eryngium
Species: bourgatii
Cultivar: 'Picos Amethyst'

Category: Perennials
Growth Rate: Average
Features: Makes good cut flowers, Has interesting foliage, Good for a rock garden, Provides winter colour

Hardiness: HardyHeight: 0.55 m (55 cm)
Sun/Shade: Full sunSpread: 0.50 m (50 cm)

Foliage Type: Semi EvergreenFlower Colour: Blue, Grey
Foliage Colour: Green, Grey/Silver, VariegatedFlowering Period: July & August

Soil Type: Sandy/Light or Chalky/Alkaline
Soil Moisture: Dry, well drained

Easily recognised by their ruff of spiky bracts surrounding a prominent cone-like centre of tiny flowers, sea hollies make a bold statement in a sunny border or gravel garden. This variety has deeply cut deep blue bracts held on stiff blue stems in July and August. The attractive dark green marbled foliage which appears before the flowers is shown off to best effect planted in gravel. Or try it in bold clumps among grasses. Eryngiums are also perfect for use in dried flower arrangements.

  • Garden care: Lift and divide large colonies in spring. Avoid the temptation to cut back the flower-heads in autumn as they provide interest in the winter garden.


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