Eryngium planum Magical White Lagoon - Eryngium planum White Glitter seeds - Flat Sea Holly
Eryngium planum Magical White Lagoon - Eryngium planum White Glitter seeds - Flat Sea Holly
Eryngium planum
Blue Eryngo, Flat Sea Holly, Blue Sea Holly
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This plant carries a 12 months recovery warranty
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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 Magical White Lagoon® is a sea holly or blue thistle with captivating green and silvery tones. It is a deciduous perennial plant that thrives in dry, rocky, and poor soil, with spiny silver-green foliage. In summer, it produces green and silvery white cone-shaped flowers on its strong silver stems, radiating light and captivating reflections, nestled within bristly bracts. Over time, the colour intensifies and spreads along the stems. This plant has an architectural and highly decorative structure, perfect for sunny rockeries and borders. Its flowers also look beautiful in fresh or dried bouquets.
Eryngium planum (synonymous with Eryngium armatum), commonly known as the flat sea holly, belongs to the Apiaceae family, like celery and carrots. It is a perennial herbaceous plant with a root system originating from the mountains of central Europe. In the wild, it thrives in dry, sunny locations with well-drained gravelly or sandy soil.
With an upright and bushy habit, Magical White Lagoon quickly reaches around 90 cm in height and 40 cm in spread. Its base forms a rosette of petiolate basal leaves, ovate with heart-shaped bases, thick, toothed, silvery green, glossy, and evergreen in winter. Tall, silver-colored, branched stems, adorned with a few small spiny leaves without petioles, rise from the basal rosettes. Flowering occurs between June and August at the ends of these branches. The blooms appear as ovoid green inflorescences of 2 cm in diameter, composed of numerous tiny silvery white flowers, surrounded at the base by thin, metallic-reflecting, toothed bracts. This flowering phase attracts many pollinating insects. It readily self-seeds in light, well-drained soils.
Eryngium planum Magical White Lagoon® is a relatively short-lived perennial plant, especially in fertile, moist soil, but it self-seeds naturally in favourable conditions. It looks stunning paired with Lychnis coronaria, grasses (Stipa, Carex comans, Muhlenbergia), catmints, and shrubby salvias, but also complements well with roses, hollyhocks, love-in-a-mist, cosmos, or tall mulleins in dry gardens. A plant to admire in a cottage-style border, for the allure of its colour and somewhat futuristic look.
Flowering
Foliage
Plant habit
Botanical data
Eryngium
planum
Apiaceae
Blue Eryngo, Flat Sea Holly, Blue Sea Holly
Cultivar or hybrid
Planting and care
In the wild, Eryngium planum is almost always found in uncultivated places, dry and stony hillsides, flooded with sun, even limestone. There, it hardly exceeds 60 cm in height and does not collapse, unlike it sometimes does in the fertile and moist soils of gardens. Similarly, its colouring will be accentuated in poor and dry soils. If it does not live very long, this sea holly will easily self-seed in light soil. It is best to plant Magical White Lagoon in very well-drained soil, possibly enriched with pebbles and gravel, to help it withstand wet and cold winters, although it is very hardy: its roots can rot in damp and frozen soil.
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).
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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.