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Aster ageratoides Eleven Purple

Aster ageratoides Eleven purple
Japanese Aster, White Michaelmas Daisy, Asian Starwort

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has never flowered

jacqueline, 25/08/2020

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This hybrid aster is a small, robust, charming, and tireless young plant. It forms a low, dense, and septate habit that disappears under a multitude of mauve-violet flowers carried by purple stems, from September until the first frost. Not demanding and resistant to powdery mildew, this extremely floriferous variety works wonders in a rockery or at the front of perennial beds. To be planted in a sunny position, in well-drained but moist soil.
Flower size
3 cm
Height at maturity
35 cm
Spread at maturity
30 cm
Exposure
Sun, Partial shade
Hardiness
Hardy down to -20°C
Soil moisture
Moist soil
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Best planting time March, October
Recommended planting time February to April, September to November
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Flowering time September to November
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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

Aster ageratoides Eleven Purple (Flowering) Flowering
Aster ageratoides Eleven Purple (Foliage) Foliage
Aster ageratoides Eleven Purple (Plant habit) Plant habit

Flowering

Flower colour mauve
Flowering time September to November
Inflorescence Flower head
Flower size 3 cm
Fragrance slightly scented
Good for cut flowers Cut flower blooms

Foliage

Foliage persistence Deciduous
Foliage colour green

Plant habit

Height at maturity 35 cm
Spread at maturity 30 cm
Growth rate fast

Botanical data

Genus

Aster

Species

ageratoides

Cultivar

Eleven purple

Family

Asteraceae

Other common names

Japanese Aster, White Michaelmas Daisy, Asian Starwort

Origin

Cultivar or hybrid

Product reference875851

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.

16
€14.50 Each
6
€19.50

Planting period

Best planting time March, October
Recommended planting time February to April, September to November

Intended location

Suitable for Meadow, Woodland edge
Type of use Border, Edge of border, Slope
Hardiness Hardy down to -20°C (USDA zone 6b) Show map
Ease of cultivation Amateur
Planting density 5 per m2
Exposure Sun, Partial shade
Soil pH Any
Soil type Chalky (poor, alkaline and well-drained), Clayey (heavy), Clayey-chalky (heavy and alkaline), Silty-loamy (rich and light), Stony (poor and well-drained)
Soil moisture Moist soil, Ordinary soil, but well-prepared.

Care

Pruning instructions Remove the stems and faded flowers at the end of winter.
Pruning Pruning recommended once a year
Pruning time March
Disease resistance Good
Overwinter Can be left in the ground
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