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Eryngium planum (Blue eryngo)
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1 hour care
per year
per year
0.9m
Max height
Max height
0.45m
Max spread
Max spread
2-5 years
To maturity
To maturity
Plant details
Botanical name
Eryngium planum
Other names
Blue eryngo, Sea holly, Flat-leaved eryngo, Plains eryngo
Genus
Eryngium Eryngium
Species
E. planum - E. planum is a clump-forming, evergreen perennial with rosettes of toothed, oblong to ovate, dark grey-green leaves and, in summer, upright, branched stems bearing cone-like, light blue flower-heads with conspicuous, linear, spiny, blue-green bracts.
Eryngium planum is: Evergreen
Habit
Clump-forming, Erect
Flower
Blue in Summer; Blue in Autumn
Foliage
Grey-green in All seasons
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
Divide carefully. Slow to establish after division.
Propagation methods
Division, Root cuttings, Seed
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Where to grow
Eryngium planum (Blue eryngo) will reach a height of 0.9m and a spread of 0.45m after 2-5 years.
Suggested uses
Coastal, Cottage/Informal, Flower Arranging, Beds and borders, Gravel, Wildlife
Cultivation
Grow in dry, poor or moderately fertile, well-drained soil in full sun. Protect from winter wet. Dislikes 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
We do not currently have companion plants added for this plant.
Botanical name
Eryngium planum
Other names
Blue eryngo, Sea holly, Flat-leaved eryngo, Plains eryngo
Genus
Eryngium Eryngium
Species
E. planum - E. planum is a clump-forming, evergreen perennial with rosettes of toothed, oblong to ovate, dark grey-green leaves and, in summer, upright, branched stems bearing cone-like, light blue flower-heads with conspicuous, linear, spiny, blue-green bracts.
Foliage
Evergreen
Habit
Clump-forming, Erect
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Colour
Flower
Blue in Summer; Blue in Autumn
Foliage
Grey-green in All seasons
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
Divide carefully. Slow to establish after division.
Propagation methods
Division, Root cuttings, Seed
Monthly care advice
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Where to grow
Eryngium planum (Blue eryngo) will reach a height of 0.9m and a spread of 0.45m after 2-5 years.
Suggested uses
Coastal, Cottage/Informal, Flower Arranging, Beds and borders, Gravel, Wildlife
Cultivation
Grow in dry, poor or moderately fertile, well-drained soil in full sun. Protect from winter wet. Dislikes 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
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... |
ARTICLES WITH THIS PLANT
Created by garden designer Charlie Hartigan of Envisage Gardens, 1 in 10 garden at RHS Tatton Park Flower Show 2019 was designed as part of the RHS Young Designer of the Year competition. read more
"The Journey of Life” garden marks the birth of a new style of garden design “Poetic Gardens”, as identified by landscape designer and 2015 gold medal winner, Edward Mairis. read more
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