Aster ageratoides Eleven Purple
Aster ageratoides Eleven Purple
Aster ageratoides Eleven Purple
Aster ageratoides Eleven purple
Japanese Aster, White Michaelmas Daisy, Asian Starwort
has never flowered
jacqueline, 25/08/2020
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Description
Aster ageratoides 'Eleven Purple' is undoubtedly the best in the category of dwarf autumn asters, as this small plant is robust, floriferous, pleasantly coloured, and beautifully made. This variety forms a small, dense, and tight cushion, with a very regular appearance, which disappears under a dazzling flowering. The beautiful mauve-blue star-shaped flowers with yellow hearts are carried by purple stems. It is a hardy perennial and not very sensitive to powdery mildew. With an indefinable charm, it will become indispensable in a large bed of wildflowers or more sophisticated flowers.
Aster ageratoides is one of the parents of this hybrid variety, selected in Belgium for its incredible floribundity and its compact habit. Like all asters, this perennial belongs to the Asteraceae family. 'Eleven Purple' develops from a sucker stump composed of upright, short, stiff, and tight green-purple stems, carrying slightly rough foliage of a matte green. The adult plant will form a rounded clump 35cm (14in) tall and 30cm (12in) in diameter. From September, countless bouquets of small flowers appear in 3cm (1in) heads, with very fine outer ligules, of a bright mauve-violet shade. The flowers almost smother the foliage. This abundant flowering will only end with the arrival of frost, in October-November depending on the regions. It is a deciduous plant, whose above-ground vegetation dies in winter and regrows in spring.
Plant Aster 'Eleven Purple' in any moist soil that is not too dry. It even accepts poor quality soil, or compact and clayey soils. It cannot compete with other perennials with powerful root systems. In the garden, for example, plant it with perennial geraniums, other dwarf asters, lady's mantle, or light grasses such as Stipa tenuifolia or Muhlenbergia capillaris. It also forms beautiful bright streaks between large rocks in a rock garden. Its abundant and delicate flowering attracts pollinating insects. Its flowering stems are lovely in a vase, in a floral arrangement, in the company of September roses.
The genus offers many species, represented by a multitude of floriferous varieties. There are varieties of all sizes in an extremely rich range of colours. Several species are associated with each season.
Aster ageratoides Eleven Purple in pictures
Flowering
Foliage
Plant habit
Botanical data
Aster
ageratoides
Eleven purple
Asteraceae
Japanese Aster, White Michaelmas Daisy, Asian Starwort
Cultivar or hybrid
Planting and care
Plant in any not too dry soil; it even accepts poor quality soil, and compact and clayey soils. If it does adapt to poor and relatively dry soils, it will require fertilisation in April, more frequent watering in summer, and mulching to maintain moisture at its base. In beds, respect a spacing of at least 50cm (20in) between plants. At the end of flowering, prune the clump to 10cm (4in). Divide the clumps every 2 to 3 years to keep vigorous stumps and propagate this wonderful plant throughout the garden.
Plant it in a sunny location that will allow it to express its full potential. Its robust foliage seems resistant to powdery mildew, even in hot weather. Its only requirement is not to compete with other perennials with a strong root system. Prune dry branches in winter.
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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