Eryngium planum Blauer Zwerg
Eryngium planum Blauer Zwerg
Eryngium planum Blauer Zwerg
Eryngium planum Blauer Zwerg
Eryngium planum Blauer Zwerg
Flat Sea Holly, Blue Eryngo
The plant did not survive the summer.
danièle, 11/11/2024
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This plant carries a 12 months recovery warranty
More information
We guarantee the quality of our plants for a full growing cycle, and will replace at our expense any plant that fails to recover under normal climatic and planting conditions.
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Description
Eryngium planum 'Blauer Zwerg' is a perennial noted for its spiky inflorescences that are grey-green and carried on bluish-grey stems during the summer months.
This sea holly is a dwarf variety that will not exceed 50 cm (20in) in height, and it has highly branched flower stalks above rosettes of small heart-shaped, dentate leaves, as well as flowers clustered in numerous small heads that form delicate metal blue stars between July and September. The spiky margins of the colourful bracts, which resemble thistles, are the reason for its other common name, ornamental thistle.
From picturesque to contemporary scenes, its colours range from green to silver and its graphic design allow it to fit into many situations. Ideally in full sun, Eryngium planum 'Blauer Zwerg' loves heat and drought, and adapts to all sunny, chalky soils that are well-drained and deep; it even tolerates coastal areas. What it dislikes most is moisture, especially in winter. To prolong its decorative effect beyond the warmer days outdoors, you can easily make dried bouquets with it, as it retains its beautiful hues when dried.
Eryngium planum 'Blauer Zwerg' works well in a rock garden, flowerbed, wild garden, or contemporary garden alongside Gauras, Verbascums, Salvias or Perovskias, or some Stipas.
Eryngium planum Blauer Zwerg in pictures
Flowering
Foliage
Plant habit
Botanical data
Eryngium
planum
Blauer Zwerg
Apiaceae
Flat Sea Holly, Blue Eryngo
Cultivar or hybrid
Planting and care
Eryngium planum 'Blauer Zwerg' can be planted from September to April in well-drained, dry, poor and stony soil in full sun. In heavy soil or in a region that is too humid, mix compost, sand and gravel with your garden soil and plant on a mound. Don't forget to place gravel at the bottom of the hole for good drainage. It is sensitive to winter moisture.
Planting period
Intended location
Care
Planting & care advice
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Hardiness is the lowest winter temperature a plant can endure without suffering serious damage or even dying. However, hardiness is affected by location (a sheltered area, such as a patio), protection (winter cover) and soil type (hardiness is improved by well-drained soil).
In temperate climates, pruning of spring-flowering shrubs (forsythia, spireas, etc.) should be done just after flowering.
Pruning of summer-flowering shrubs (Indian Lilac, Perovskia, etc.) can be done in winter or spring.
In cold regions as well as with frost-sensitive plants, avoid pruning too early when severe frosts may still occur.
The harvesting period indicated on our website applies to countries and regions in USDA zone 8 (France, England, Ireland, the Netherlands).
In colder areas (Scandinavia, Poland, Austria...) fruit and vegetable harvests are likely to be delayed by 3-4 weeks.
In warmer areas (Italy, Spain, Greece, etc.), harvesting will probably take place earlier, depending on weather conditions.
The sowing periods indicated on our website apply to countries and regions within USDA Zone 8 (France, UK, Ireland, Netherlands).
In colder areas (Scandinavia, Poland, Austria...), delay any outdoor sowing by 3-4 weeks, or sow under glass.
In warmer climes (Italy, Spain, Greece, etc.), bring outdoor sowing forward by a few weeks.
The planting period indicated on our website applies to regions in USDA Zone 9a (East Coast and Midlands: Dublin, Wexford, Waterford, Kilkenny, Portlaoise). It will vary depending on where you live:
- On the west coast and in the north-west (Galway, Limerick, Sligo, Donegal, Westport), delay planting by 1 to 2 weeks in spring and bring it forward by 1 to 2 weeks in autumn compared to the dates given, preferably choosing periods without strong winds.
- In the inland hills and plateaus (Wicklow Mountains, Macgillycuddy’s Reeks, Connemara, Killarney), it is best to plant in spring (April–May) or autumn (September–October), avoiding periods of waterlogged soil in winter and strong winds, which pose the main risk to newly planted trees in these areas.
The flowering period indicated on our website applies to regions in USDA Zone 9a, such as the East Coast and Midlands, including Dublin, Wexford, Waterford, Kilkenny and Portlaoise.
This will vary depending on where you live:
- On the west coast and in the northwest (Galway, Limerick, Sligo, Donegal and Westport), it will be delayed by one to two weeks compared to the given dates, due to stronger Atlantic winds and less spring sunshine.
- In the inland hills and plateaus (the Wicklow Mountains, the Macgillycuddy's Reeks, Connemara and Killarney), flowering will be delayed by two to three weeks. Flowering mainly occurs between May and July, with the limiting factors being less frost and more of the excessive humidity, strong winds and lack of sunshine that are characteristic of these areas.
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