Ranunculus asiaticus Crown Nervion® - Persian buttercup
Ranunculus asiaticus Crown Nervion® - Persian buttercup
Ranunculus asiaticus Crown Nervion® - Persian buttercup
Ranunculus asiaticus Crown Nervion®
Persian buttercup
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Description
Ranunculus asiaticus Crown Nervion® is a florist's ranunculus unlike any other. This Crown-type variety stands out with its orange flower topped with a prominent green tuft. Its abundant flowering and long stems make it an excellent cut flower, as well as a remarkable spring plant for the garden. Its decidedly different style and bright colours are much appreciated.
This variety belongs to the Ranunculaceae family. The type species, Ranunculus asiaticus, is commonly known as florist's ranunculus and Persian buttercup. It is a tuberous perennial, often grown as an annual, more persistent in Mediterranean climates. The wild form is native to the eastern Mediterranean and widespread as far as western and southwestern Iran. In the wild, it grows in regions with mild winters and drier summers. It is not very hardy, it grows during the cool season, flowers in spring, and rests in summer.
Crown Nervion® is a creation from the Romance™/Crown series, developed by Japanese breeder Aya Engei. The Crown group is characterised by a curious green crown that tops the flower. Crown Nervion® has a slightly smaller flower than some other Crown varieties, but it is very floriferous, with good stem length. The plant first forms a clump of basal leaves, then flower stems up to 50 cm tall. The deciduous foliage disappears after flowering during the summer dormancy. It flowers from April to June, depending on the planting date and climate. It will be earlier in mild climates and under cover. In Crown Nervion®, the flowers are double, 6-8 cm wide, composed of numerous satiny apricot-orange petals, tightly packed around a centre resembling a tuft of leaves. It is this floral architecture that makes it so unique.
Asian ranunculus has been cultivated and selected for floristry for a very long time, explaining the extraordinary diversity of its current horticultural forms.
Crown Nervion® is above all a flower for composing unusual cut flower arrangements. Plant it in small groups in a dedicated cut flower bed, or in a large pot near the house. In April-May, it combines beautifully with fringed tulip 'Vincent van Gogh', almost black, parrot tulip 'Super Parrot', green and white, columbine 'Black Barlow', a very dark purple, and ornamental garlic 'Mont Blanc', impressive with its large white umbels.
By lifting the tubers in autumn, before the frosts, you can grow this plant like a gladiolus.
Ranunculus asiaticus Crown Nervion® - Persian buttercup in pictures
Plant habit
Flowering
Foliage
Botanical data
Ranunculus
asiaticus
Crown Nervion®
Ranunculaceae
Persian buttercup
Cyprianthe asiatica, Ranunculus africanus, Ranunculus sanguineus, Ranunculus flammipetalus
Cultivar or hybrid
Planting and care
Plant florist's ranunculus 'Crown Nervion' in autumn, in mild climates or in pots (under cover), for an early flowering (March-April-May). It can also be planted in spring, in cold climates, for a more summer flowering.
It thrives in partial shade as well as in full sun. Plant it in light soil, possibly enriched with coarse sand, humus-bearing and moist. This plant dislikes calcareous soils. In autumn, lift the tubers and store them in a dry, cool place to protect them from frost, as they are not very hardy.
Before planting, soak the tubers for half a day. When planting, set the tubers in a mixture of equal parts garden soil, leaf mould and fairly coarse river sand. It will flower 120 days after planting.
Planting density: 16 to 20 tubers per square metre.
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.