Eryngium x zabelii 'Big Blue' (Sea holly 'Big Blue')
Other names: Eryngium 'Big Blue'
'Big Blue' is an upright, clump-forming, deciduous perennial with spiky, deeply divided, silvery grey-green, leaves and, in summer, stiff, branched stems bearing cone-shaped, blue flowerheads surrounded by prominent, spiny, silvery-blue bracts.
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0.45m max. spread |
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0.8m max. height |
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2-5 years to maturity |
Eryngium bourgatii (Mediterranean sea holly)
Other names: Bourgati's eryngo
E. bourgatii is a clump-forming, herbaceous perennial with rounded, deeply lobed, spiny, silver-veined, dark green leaves and, in summer, branching, deep blue stems bearing umbels of blue or grey-green, cone-like flowers with prominent, lance-shaped, blue-flushed, silver bracts.
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0.3m max. spread |
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0.45m max. height |
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2-5 years to maturity |
Eryngium variifolium (Variable-leaved sea holly)
Other names: Moroccan sea holly
E. variifolium is a clump-forming, evergreen perennial forming rosettes of ovate, toothed, spiny, slightly fleshy, dark green leaves with creamy-white veins and, from summer into autumn, branched, leafy stems bearing umbels of violet-blue flowers with narrowly lance-shaped, grey-blue bracts.
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0.5m max. spread |
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1m max. height |
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2-5 years to maturity |
Eryngium x zabelii 'Jos Eijking' (Sea holly 'Jos Eijking')
Other names: Eryngium 'Jos Eijking' , Eryngium 'Sapphire Blue'
'Jos Eijking' is a clump-forming, deciduous to semi-evergreen perennial with a basal rosette of heart-shaped, spiny-toothed, dark green leaves. Blue stems bear spiny, three-lobed, dark green leaves and, in summer, cylindrical umbels of violet-blue flowers surrounded by rigid, spiny-toothed, blue-green bracts.
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0.6m max. spread |
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0.75m max. height |
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2-5 years to maturity |
Eryngium planum 'Jade Frost' (Sea holly 'Jade Frost')
Other names: Blue eryngo 'Jade Frost', Eryngium 'Jade Frost'
'Jade Frost' is a clump-forming, evergreen perennial with rosettes of toothed, oblong to ovate, grey-green leaves with wide, creamy-white margins, flushed pink when young, and, in summer, upright, branched stems bearing cone-like, purple to violet-blue flower-heads with conspicuous, spiny bracts.
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0.2m max. spread |
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0.8m max. height |
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2-5 years to maturity |
Eryngium bourgatii 'Graham Stuart Thomas' (Bourgati's eryngo 'Graham Stuart Thomas')
Other names: Sea holly
'Graham Stuart Thomas' is a herbaceous perennial, with deeply cut, silver-blue leaves. In summer it has violet-blue, thistle-like flowers on branching, wiry stems.
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0.3m max. spread |
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0.8m max. height |
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2-5 years to maturity |
Eryngium 'Cobalt Star' (Sea holly 'Cobalt Star')
'Cobalt Star' is a vigorous, clump-forming, herbaceous perennial with rounded, deeply lobed, spiny, silver-veined, dark green leaves and, in summer, dark, branching, stems bearing umbels of tiny, purple-blue, cone-like flowers with prominent, lance-shaped, spiny, purple-blue bracts.
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0.5m max. spread |
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0.7m max. height |
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2-5 years to maturity |
Eryngium x zabelii 'Donard Variety' (Sea holly 'Donard Variety')
'Donard Variety' is an herbaceous perennial with silvery-veined foliage. In summer it has metallic blue flower heads surrounded by a ruff of narrow spiky purple bracts.
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0.5m max. spread |
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0.6m max. height |
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2-5 years to maturity |
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