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Aster sibiricus

Aster sibiricus
Siberian Aster, Siberian Starwort

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Tiny naked young plants but with good roots. I'm a bit worried about their growth in the spring.

Thierry, 30/11/2019

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This plant carries a 12 months recovery warranty

More information

A small, hardy perennial herbaceous plant, with large violet-purple flowers solitary or clustered in corymbs between June and July.
Flower size
5 cm
Height at maturity
30 cm
Spread at maturity
30 cm
Exposure
Sun, Partial shade
Hardiness
Hardy down to -34°C
Soil moisture
Moist soil
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Best planting time February to March, September to October
Recommended planting time February to April, September to November
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Flowering time June to July
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Description

Aster sibiricus is a perennial herbaceous plant native to the cold regions of northern America and Eurasia, making it a hardy and undemanding plant. The flowering period is between June and July, with small spreading tufts composed of beautiful, wide purple-violet heads, either solitary or grouped in loose corymbs.

 

 

Standing at 30 cm (12in) tall, the Siberian Aster is a small Aster that adds life to the garden in early summer. Its short stems, often purple but sometimes green, are adorned with oblong, lanceolate leaves covered in short, rough hairs. It is highly resistant to cold and is not too concerned about soil type or exposure, although it prefers sandy or rocky soil that is well-drained but not too dry. You can plant it along the edge of a flower bed, in a rock garden, or in a trough accompanied by Carex comans Frosted Curls, small Sedums, or Saxifrage to create an alpine garden, or to fill the gaps between paving stones with Campanula poscharskyana.

Asters belong to the Asteraceae or Compositae family, which primarily consists of herbaceous plants. It is an extremely diverse genus, with a wide range of colours and sizes. Depending on the cultivars, it is possible to extend the flowering period from spring to the end of autumn, allowing garden enthusiasts to enjoy these charming daisy-like flowers for most of the year.

Aster sibiricus in pictures

Aster sibiricus (Flowering) Flowering
Aster sibiricus (Foliage) Foliage

Flowering

Flower colour mauve
Flowering time June to July
Inflorescence Flower head
Flower size 5 cm

Foliage

Foliage persistence Deciduous
Foliage colour medium green

Plant habit

Height at maturity 30 cm
Spread at maturity 30 cm
Growth rate normal

Botanical data

Genus

Aster

Species

sibiricus

Family

Asteraceae

Other common names

Siberian Aster, Siberian Starwort

Origin

Rocky Mountains

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Planting and care

Plant Siberian Aster in autumn or spring in rocky or sandy but not too dry soil, in a rockery or trough, or to border a bed or path. The exposure is not important and the soil can be poor, however, ensure that it is well-draining while retaining some moisture by adding organic matter at the time of planting if your soil is very poor, and gravel if your soil is too heavy. To plant: dig the soil well to a depth of 20 cm (8in), add a base fertiliser at the bottom of the planting hole, remove your plant from its pot and position, covering the top of the root ball with 3 cm (1in) of soil, then backfill and water thoroughly to remove any air pockets.

Planting period

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

Intended location

Suitable for Meadow
Type of use Border
Hardiness Hardy down to -34°C (USDA zone 4) Show map
Ease of cultivation Amateur
Planting density 7 per m2
Exposure Sun, Partial shade
Soil pH Any
Soil type Chalky (poor, alkaline and well-drained), Silty-loamy (rich and light), Stony (poor and well-drained)
Soil moisture Moist soil, well-drained

Care

Pruning instructions Remove the stems and faded flowers at the end of winter. Divide the crown every 3 to 4 years to rejuvenate it.
Pruning Pruning recommended once a year
Pruning time March to April
Disease resistance Very good
Overwinter Can be left in the ground
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