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botanical name:
Eryngium planum 'Blaukappe'
Eryngium planum 'Blaukappe' © Deeproot Plant Base
common name:  Sea Holly
synonyms:  Eryngium 'Blue Cap'
family:  Apiaceae
characteristics: perennial, evergreen
height: 0.90m
width: 0.45m
growth rate: medium
growth habit: clump
leaf colour: green
flower colour: blue
stem/bark: violet
main season: Summer
aspect: full sun
conditions: dry soil, sandy soil, coastal
preferred soil pH: alkaline
minimum temp: -35°C
USDA zone: 4 to 9
Clump-forming evergreen with toothed ovate, dark green basal leaves and lobed, spiny, blue-tinted stem leaves. Small rounded thistle-like flowers of intense blue on wiry, branching metallic violet-blue stems.

Well drained, poor to moderately fertile soil in full sun. Avoid excessive winter wet. Drought tolerant.

By division or root cuttings.

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