Aesculus Dallimorei - Dallimore horse-chestnut
Aesculus Dallimorei - Dallimore horse-chestnut
Aesculus hippocastanum + flava
Dallimore horse-chestnut, Horse Chestnut, Yellow Buckeye
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This plant carries a 24 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
Aesculus Dallimorei, commonly known as Dallimore's Horse Chestnut, is a rare ornamental tree in cultivation, sought after for its beautiful spring flowers, wide crown, and attractive palmate foliage. This tree is a graft chimera rather than a hybrid, combining the characteristics of the Horse Chestnut with those of the American Yellow Buckeye, Aesculus flava. It will make a unique addition to the garden of a rare plant enthusiast.
Aesculus Dallimorei, also known as Aesculus + dallimorei, is a chimera resulting from the grafting of tissues from Aesculus hippocastanum (the Horse Chestnut) and A. flava (the Yellow Buckeye), or sometimes A. pavia (the Red Buckeye), according to sources. William Dallimore observed that a yellow buckeye growing near his house in Bidborough, Kent, bore a branch that, with its leaves and flowers, resembled the common Horse Chestnut; the tree was grafted and the branch in question was born from the union of a rootstock and a scion. This botanical curiosity was described in 1956. This horse chestnut belongs, like its parents, to the family Hippocastanaceae.
Dallimore's Horse Chestnut can reach a height of 6 to 10 m, forming a short trunk and a dense, spherical crown that will spread 4 to 6 m wide. Its deciduous foliage is composed of 5 to 7 palmate leaflets, arranged in a fan shape, and measuring between 15 and 30 centimetres long. The leaves do not exactly resemble those of each parent plant, particularly due to the shape of the leaflets. The leaflets are broadly elliptical and pointed, slightly wrinkled, dark green on the upper side, with a white down on the underside. In autumn, they turn yellow-brown before falling. Flowering occurs in May-June. The flower colour can vary depending on sources and clones, ranging from creamy white with a red spot at the base to red, pink, or orange. Individually, the flowers have four petals arranged in two different pairs, with the lower pair shorter but wider than the upper pair. In the Horse Chestnut, the petals number five and are all the same size. They appear in upright panicles of 20-25 cm and are highly attractive to pollinating insects. This tree is sterile and generally does not produce viable fruits.
Aesculus Dallimorei is a collectible tree that deserves to be showcased in a large garden. This horse chestnut is hardy (-20°C) and easy to grow in loose, well-drained garden soil that is not too dry. In the garden, it can be used as a specimen tree, planted in groups to create a screen or hedge, or integrated into a large grove, with a Japanese Flowering Dogwood (Cornus kousa) or a Golden Rain Tree (Koelreuteria paniculata), for example.
Plant habit
Flowering
Foliage
Botanical data
Aesculus
hippocastanum + flava
Sapindaceae
Dallimore horse-chestnut, Horse Chestnut, Yellow Buckeye
Aesculus x dallimorei
Cultivar or hybrid
Planting and care
Aesculus dallimorei should be planted in spring or autumn in ordinary, but deep, soil that remains moist, fertile, slightly acidic, neutral, or slightly alkaline. Plant it in a sunny or partially shaded location. Deep digging is recommended before planting. Reserve enough space for it, as it can reach a width of 6m for the crown. Water and mulch to maintain soil moisture. Feed in spring. Prune in February by removing old stems.
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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