Eryngium planum Neptunes Gold
Eryngium planum Neptunes Gold
Eryngium planum Neptunes Gold
Eryngium planum Neptunes Gold
Eryngium planum Neptunes Gold
Eryngium planum Neptunes Gold
Eryngium planum Neptunes Gold
Eryngium planum Neptunes Gold
Eryngium planum Neptunes Gold
Eryngium planum Neptunes Gold
Eryngium planum Neptune's Gold
Flat Sea Holly, Blue Eryngo
Never had the chance to see it, it never sprouted.
Nes , 15/07/2025
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Description
Eryngium planum Neptune's Gold is a new and very bright variety, forming a beautiful, well-branched clump. Its spring leaves are bright yellow, then yellowish-green in summer. From July to September, it displays numerous bright blue umbels, surrounded by yellow bracts. A striking contrast between the yellow foliage and the purplish-blue flowers!
Eryngium planum is native to central and southeastern Europe, as well as central Asia, and belongs to the family Apiaceae. The cultivar 'Neptune's Gold' is a herbaceous perennial plant with a taproot, measuring about 60 cm (24in) tall and 45 cm (18in) wide. It forms a compact and bushy spreading clump, with semi-evergreen foliage. It has a rosette of divided basal leaves, initially bright yellow in spring, then yellow-green in summer. Its well-branched, erect stems are a bright golden yellow turning purplish-blue. From July to September, they bear numerous heads of beautiful violet-blue flowers. Its inflorescences measure 3 cm (1in) long and are cone-shaped, surrounded by narrow, toothed bracts, 2 to 3 cm (1in) long, which are golden yellow. Its flowers attract many pollinating insects.
This Eryngium appreciates the sun and poor, sandy, rocky, well-drained soils. Particularly decorative with its compact bushy habit, its very long blue flowering period, uninterrupted throughout the summer, and its splendid golden spiny foliage, this thistle will be the perfect companion for plants in poor, dry areas, such as grasses, false wallflowers, Perovskia, shrubby wallflowers, lavenders, Agapanthus, and garden irises, by choosing a yellow and blue colour scheme. However, it is advisable to plant it in the background of borders to avoid getting too close to its spines! This blue thistle is one of the best plants for creating beautiful dried bouquets. Just cut the stems before the flowers fully open and hang them upside down to dry.
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Eryngium planum Neptunes Gold in pictures
Flowering
Foliage
Plant habit
Botanical data
Eryngium
planum
Neptune's Gold
Apiaceae
Flat Sea Holly, Blue Eryngo
Cultivar or hybrid
Planting and care
Eryngium planum 'Neptune's Gold' is a perennial plant that is easy to grow under optimum conditions, and is perfectly hardy. It should preferably be planted in the spring, in a sunny location, in ordinary, slightly fertile, light, sandy or stony soil, with not too much limestone, which is not too dry but is especially well-drained. It does not tolerate heavy and wet soils, especially during the winter season. Therefore, in the case of heavy soil or in a region that is too wet, it will be necessary to mix compost, sand, and gravel with the garden soil and plant it in a raised bed. In order to ensure good drainage, it will be necessary to place a good layer of gravel at the bottom of the planting hole. After flowering, remove the faded flowers, unless you want the seeds to scatter in the garden, thus obtaining spontaneous sowing and new young plants. Eryngiums can be attacked by aphids on the stems and inflorescences, as well as on their roots, weakening the plants and sometimes causing them to wither (root rot). On the other hand, they can be susceptible to powdery mildew and attacked by snails and slugs.
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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