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 'Blue Waves' (Sea holly 'Blue Waves')
Other names: Eryngo 'Blue Waves', Eryngium 'Hillier Blue Waves'
'Blue Waves' is a clump-forming, evergreen to semi-evergreen perennial with rounded, deeply lobed, toothed, grey-green, leaves, paler at the veins, and, in summer, sturdy, upright, branched, dark purple-blue stems bearing cone-like, violet-blue flower-heads with long, narrow, spiny, purple-blue 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 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 planum 'Blauer Zwerg' (Sea holly 'Blauer Zwerg')
Other names: Eryngium planum Blue Dwarf
'Blauer Zwerg' forms clumps of branched stems, and cone-like, lilac-blue flowerheads with spiny bracts in late summer.
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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 pandanifolium 'Physic Purple' (Giant sea holly 'Physic Purple')
Other names: Eryngium decaisneanum 'Physic Purple'
'Physic Purple' is a tufted, clump-forming, evergreen perennial with a rosette of linear to sword-shaped, spiny, silvery green leaves and, from late summer into autumn, erect, branching stems bearing cone-shaped umbels of dark purple to maroon flowers.
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1m max. spread |
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1.5m max. height |
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2-5 years to maturity |
Eryngium 'Pen Blue' (Sea holly 'Pen Blue')
Other names: Eryngium bourgatii 'Pen Blue'
'Pen Blue' is a clump-forming, evergreen perennial with rounded, deeply lobed, toothed, grey-green, leaves and, in summer, sturdy, upright, branched, dark purple-blue stems bearing cone-like, violet-blue flower-heads with long, narrow, spiny, violet-blue 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 planum 'Blaukappe' (Sea holly 'Blaukappe')
Other names: Eryngium 'Blue Cap'
'Blaukappe' is a clump-forming, evergreen perennial with oblong, toothed, dark green basal leaves and sturdy, blue-flushed, branched stems bearing umbels of blue flowers with prominent, spiky, linear, blue-grey bracts in summer and early autumn.
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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 planum 'Magical Blue Lagoon' (Blue eryngo 'Magical Blue Lagoon')
Other names: Eryngium planum 'Kolmblula'
'Magical Blue Lagoon' is a clump-forming, evergreen to semi-evergreen perennial with rounded, deeply lobed, toothed, grey-green, leaves, paler at the veins, and, in summer, sturdy, upright, branched stems bearing cone-like, pale blue flower-heads with long, narrow, spiny, purple-blue bracts.
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0.5m max. spread |
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0.8m max. height |
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2-5 years to maturity |
Eryngium planum 'Blue Glitter' (Sea holly 'Blue Glitter')
Other names: Eryngium 'Blue Glitter'
'Blue Glitter' is a hardy perennial, with blue-green, toothed, leaves, and clumps of branched stems with cone-like, small, deep-blue flowerheads with spiny bracts in late summer to early autumn.
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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 |
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