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 planum 'Blue Hobbit' (Eryngium 'Blue Hobbit')
Other names: Sea holly 'Blue Hobbit'
'Blue Hobbit' is an heraceaous perennial with spiny edged leaves and masses of spiky, cone-like, bright purple-blue flowers on strong stems in summer and autumn.
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0.5m max. spread |
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0.9m max. height |
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2-5 years to maturity |
Eryngium bourgatii 'Oxford Blue' (Bourgati's eryngo 'Oxford Blue')
Other names: Sea holly
'Oxford Blue' forms clumps of divided leaves with prominent white veins, and cone-like, dark blue flower-heads with silvery-blue, spiny bracts.
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0.5m max. spread |
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0.5m max. height |
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2-5 years to maturity |
Eryngium bourgatii 'Picos Amethyst' (Bourgati's eryngo 'Picos Amethyst')
Other names: Sea holly
'Picos Amethyst' is a thistle like perennial, with deeply cut, grey-green leaves and lilac-blue flowers on branching, wiry stems.
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0.3m max. spread |
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0.5m max. height |
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2-5 years to maturity |
Eryngium bourgatii 'Picos Blue' (Bourgati's eryngo 'Picos Blue')
Other names: Sea holly
'Picos Blue' is a thistle like perennial, with deeply cut, grey-green leaves and blue-green, turning to lilac-blue, flowers on branching, wiry stems.
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0.3m max. spread |
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0.5m max. height |
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2-5 years to maturity |
Eryngium giganteum 'Silver Ghost' (Tall eryngo 'Silver Ghost')
'Silver Ghost' is a clump-forming biennial or short-lived, evergreen perennial with rosettes of heart-shaped basal leaves, ovate, scalloped or toothed, grey-green stem leaves and, in summer, upright, branched stems bearing cone-like, pale blue flowerheads with narrow, conspicuous, spiny, silvery-white bracts.
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0.45m max. spread |
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0.6m max. height |
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2-5 years to maturity |
Eryngium alpinum 'Blue Star' (Alpine eryngo 'Blue Star')
Other names: Alpine sea holly 'Blue Star'
'Blue Star' is an erect, herbaceous perennial with ovate to heart-shaped, glossy, dark blue-green basal leaves, palmately-lobed, blue-green stem leaves and, from midsummer until early autumn, upright, blue-green stems bearing large, cone-like, blue flower-heads surrounded by long, pinnate, softly-spiny, blue-grey bracts.
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0.6m max. spread |
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0.8m max. height |
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2-5 years to maturity |
Eryngium yuccifolium (Rattlesnake master)
Other names: Rattlesnake's master, Button snakeroot, Button eryngo
E. yuccifolium is a clump-forming, herbaceous perennial with grey-green, strap-shaped leaves with serrated margins and grey-blue, prickly flowers in summer.
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0.8m max. spread |
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1.5m max. height |
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2-5 years to maturity |
Eryngium giganteum (Miss Willmott's ghost)
Other names: Tall eryngo, Eryngium oliverianum 'Willmott's Ghost', Eryngium giganteum 'Miss Willmott's ghost'
E. giganteum is a perennial with an erect habit. Its has heart-shaped basal leaves and spiny stem leaves. In summer it bears blue, cone-like flowers with spiny silvery-grey bracts.
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0.3m max. spread |
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0.9m 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 |
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