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Aster ageratoides Starshine

Aster ageratoides Starshine
Japanese Aster, White Michaelmas Daisy, Asian Starwort

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Well taken and well flowered.

Christine, 28/11/2022

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This plant carries a 12 months recovery warranty

More information

Fairly undemanding as well as resistant to powdery mildew, this variety is unique in that it flowers from July to October, in beautiful white stars with a golden heart, and fades beautifully. The young plant is not very tall and develops into a small compact bush that will have a great impact in a pot on the terrace, in perennial beds or in large flower borders. Place this aster in the sun, in any well-drained soil that remains slightly moist.
Flower size
2 cm
Height at maturity
40 cm
Spread at maturity
40 cm
Exposure
Sun, Partial shade
Hardiness
Hardy down to -23°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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Description

Aster ageratoides Starshine is an easy-going perennial that is extremely floriferous even in partial shade, reliable and particularly resistant to powdery mildew. This variety is unique in that it blooms tirelessly, from summer to autumn, offering a multitude of brilliant white stars with golden hearts that fade without disfiguring the plant. Bushy and compact, this generous-tempered aster is an ideal plant in a large bed, in a country-style or naturalistic garden. It also makes beautiful flowering pots for the terrace or balcony.

Aster ageratoides is a perennial plant native to northern Myanmar, southwestern China and Tibet. It belongs to the Asteraceae family. The 'Starshine' variety stands out for its exceptional floribundity, even in slightly shaded areas, and its compact habit. This plant with weak suckering forms a dense and regular clump, composed of upright, stiff and closely packed stems, with deciduous, slightly rough, matte-green, deeply cut foliage. When mature, this variety will measure approximately 40 cm (16 in) in all directions. From July until October-November, countless small flowers appear with very fine white ligules, like seedlings of white daisies with yellow hearts. Very perennial, this variety is perfectly resistant to cold and powdery mildew, which often disfigures asters. Its above-ground vegetation dies in winter and reappears in spring.

Plant Aster ageratoides Starshine in any soil, in full sun or partial shade. This variety even tolerates poor-quality soil like backfill soil or compact, clayey soil. In the garden, place it at the front of your flower or shrub beds, or in a large flower border. For example, associate it with lady's mantle, heucheras, or small grasses (sun-loving Stipa, Carex or Japanese sedge, in partial shade). Its unrestrained flowering with a beautiful lightness attracts pollinating insects and promotes biodiversity in the garden. The flowering stems are very pretty in a vase in a floral arrangement, in the company of September roses.

The Aster genus offers a large number of 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.

 

Flowering

Flower colour white
Flowering time July to October
Inflorescence Flower head
Flower size 2 cm
Good for cut flowers Cut flower blooms

Foliage

Foliage persistence Deciduous
Foliage colour green

Plant habit

Height at maturity 40 cm
Spread at maturity 40 cm
Growth rate fast

Botanical data

Genus

Aster

Species

ageratoides

Cultivar

Starshine

Family

Asteraceae

Other common names

Japanese Aster, White Michaelmas Daisy, Asian Starwort

Origin

Cultivar or hybrid

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Planting and care

Plant Aster ageratoides Starshine in any rather fresh soil; it even accepts poor-quality soil such as backfill soil, or compact and clayey soils. But while it adapts to lean and relatively dry soils, it will require fertilisation in April, more frequent watering in summer, and mulching to maintain freshness at its base. In borders, respect a spacing of at least 50 cm (20 in) between plants. At the end of flowering, cut back the clump to 10 cm (4 in) to maintain a compact habit. 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 (even though it also grows and flowers in semi-shaded areas). Its robust foliage seems unaffected by 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

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 -23°C (USDA zone 6a) Show map
Ease of cultivation Amateur
Planting density 5 per m2
Exposure Sun, Partial shade
Soil pH Any
Soil type Clayey (heavy), Clayey-chalky (heavy and alkaline), Silty-loamy (rich and light), Stony (poor and well-drained)
Soil moisture Moist soil, ordinary but well-worked soil

Care

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