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Eryngium alpinum 'Blue Star' (Alpine eryngo 'Blue Star')
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1 hour care
per year
per year
0.8m
Max height
Max height
0.6m
Max spread
Max spread
2-5 years
To maturity
To maturity
Plant details
Botanical name
Eryngium alpinum 'Blue Star'
Other names
Alpine sea holly 'Blue Star', Alpine eryngo 'Blue Star'
Genus
Eryngium Eryngium
Variety or Cultivar
'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.
Eryngium alpinum 'Blue Star' is: Deciduous
Habit
Clump-forming, Erect, Erect flower stem
Flower
Blue, Grey in Summer; Grey, Blue in Autumn
Foliage
Blue-green in Spring; Blue-green in Summer
How to care
Watch out for
Specific pests
Leaf and bud eelworms Leaf and bud eelworms
Foot and root rot , Powdery mildew Foot and root rot , Powdery mildew
General care
Pruning
Cut back flower stems after flowering, or leave the seedheads for winter interest.
Propagation
Slow to re-establish after division.
Propagation methods
Division, Seed
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Where to grow
Eryngium alpinum 'Blue Star' (Alpine eryngo 'Blue Star') will reach a height of 0.8m and a spread of 0.6m after 2-5 years.
Suggested uses
Beds and borders, Coastal, Cottage/Informal, Drought Tolerant, Drying, Flower Arranging, Gravel, Salt tolerant, Wildlife
Cultivation
Plant in dry, poor to moderately fertile, well-drained soil. Full sun is essential. Protection from any winter wet. Drought tolerant once established. Resents root disturbance.
Soil type
Chalky, Loamy, Sandy
Soil drainage
Well-drained
Soil pH
Acid, Alkaline, Neutral
Light
Full Sun
Aspect
South, East, West
Exposure
Exposed
UK hardiness Note: We are working to update our ratings. Thanks for your patience.
Hardy (H4)
Companion plants
Botanical name
Eryngium alpinum 'Blue Star'
Other names
Alpine sea holly 'Blue Star', Alpine eryngo 'Blue Star'
Genus
Eryngium Eryngium
Variety or Cultivar
'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.
Foliage
Deciduous
Habit
Clump-forming, Erect, Erect flower stem
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Colour
Flower
Blue, Grey in Summer; Grey, Blue in Autumn
Foliage
Blue-green in Spring; Blue-green in Summer
How to care
Watch out for
Specific pests
Specific diseases
Foot and root rot , Powdery mildew
General care
Pruning
Cut back flower stems after flowering, or leave the seedheads for winter interest.
Propagation
Slow to re-establish after division.
Propagation methods
Division, Seed
Monthly care advice
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Where to grow
Eryngium alpinum 'Blue Star' (Alpine eryngo 'Blue Star') will reach a height of 0.8m and a spread of 0.6m after 2-5 years.
Suggested uses
Beds and borders, Coastal, Cottage/Informal, Drought Tolerant, Drying, Flower Arranging, Gravel, Salt tolerant, Wildlife
Cultivation
Plant in dry, poor to moderately fertile, well-drained soil. Full sun is essential. Protection from any winter wet. Drought tolerant once established. Resents root disturbance.
Soil type
Chalky, Loamy, Sandy
Soil drainage
Well-drained
Soil pH
Acid, Alkaline, Neutral
Light
Full Sun
Aspect
South, East, West
Exposure
Exposed
UK hardiness Note: We are working to update our ratings. Thanks for your patience.
Hardy (H4)
USDA zones
Zone 9, Zone 8, Zone 7, Zone 6, Zone 5, Zone 4, Zone 3
In order to add a note on this plant, please add this plant to your plant lists.
| This plant likes... | Garden match | |
| Soil types: | Chalky, Loamy, Sandy | Tell us... |
| Soil drainage: | Well-drained | Tell us... |
| Soil pH: | Acid, Alkaline, Neutral | Tell us... |
| Light: | Full Sun | Tell us... |
| Aspect: | South, East, West | Tell us... |
| Exposure: | Exposed | Tell us... |
| Hardiness: | Hardy (H4) | Tell us... |
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