Akebia longeracemosa
Akebia longeracemosa
Akebia longeracemosa
Akebia longeracemosa
Akebia longeracemosa
Akebia longeracemosa
Long-racemed Akebia
Planted in spring 2022. Vigorous and well established on the trellis. Its long clusters of flowers are delightful.
LB, 12/02/2025
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Description
Akebia longeracemosa, also known as the long-racemed Akebia, is a climbing plant of great uniqueness. In this very rarely cultivated Taiwanese species, the pendulous flower clusters measure about 15 cm (6in) in length. They bloom in spring, from May to July: with a chocolate-purple colour that is absolutely exquisite, they are sure to amaze with their exotic appearance and delicious vanilla fragrance. The semi-evergreen foliage is also highly ornamental, boasting a light and graceful design. This hardy Akebia thrives in damp but well-drained, fertile soils, and a sunny position.
This beautiful climbing plant with woody stems, native to subtropical and temperate forests and mountain slopes in Asia, belongs to the Lardizabalaceae family. It will quickly reach a height of 3 to 5m (10 to 16ft) with a spread of 2m (7ft), sometimes more if the growing conditions are favourable. Akebia longeracemosa bears beautiful trailing clusters of bell-shaped flowers, approximately 15 cm (6in) in length, in a dark purple coluor, from May to June or even July. As a monoecious plant, it carries both male and female flowers on the same plant, with the female flowers being larger. This highly nectar-rich flowering emits a vanilla fragrance. However, the plant is not self-fertile and requires the presence of a second plant nearby to produce fruits. The fruits appear during a warm summer. They have the shape of large swollen and arched beans, in a purple colour, approximately 6 cm (2in) long and 2 cm (1in) wide. Although edible, they offer a not very flavourful white flesh, surrounding large black seeds. The semi-evergreen or deciduous foliage, depending on the climate, is highly ornamental. It consists of five medium green oblong leaflets, which appear in spring, and takes on reddish hues in autumn.
With its exotic appearance, Akebia longeracemosa is a climbing plant of excellent hardiness, tolerating temperatures as low as -13°C (8.6°F) to -18°C (-0.4°F) in mature specimens. It clings to its support with its stems with tendrils, and can be planted on a pergola, a wall, or in a tree alongside a climbing rose or an evergreen honeysuckle, preferably in a sheltered and sunny location.
Akebia longeracemosa in pictures
Plant habit
Flowering
Foliage
Botanical data
Akebia
longeracemosa
Lardizabalaceae
Long-racemed Akebia
East Asia
Planting and care
Undemanding, Akebia longeracemosa adapts to all types of soil with a preference for rich and well-drained, neutral or slightly acidic soils. It appreciates sunny or semi-shady situations (although it should avoid full sun in the South region). Apply organic fertiliser at planting, and then every spring. It does not require pruning. However, it will still benefit from a spring cleaning after flowering, which will remove the most troublesome branches.
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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