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Herbaceous Perennial

Aster amellus 'Kobold'
  • RHS AGM
  • RHS Plants for pollinators

A sturdy, clump-forming, border perennial to 40cm in height with tough, grey-green, narrowly oval leaves, coarsely hairy above. Stems bear dense clusters of large, lilac-blue rayed, yellow centred flowers, from August to October

Size
Ultimate height
0.1–0.5 metres
Time to ultimate height
2–5 years
Ultimate spread
0.1–0.5 metres
Growing conditions
Chalk
Loam
Sand
Moisture
Moist but well–drained
pH
Alkaline, Neutral
Colour & scent
StemFlowerFoliageFruit
Spring Grey Silver Green
Summer Purple Blue Yellow Grey Silver Green
Autumn Purple Blue Yellow Grey Silver Green
Winter
Position
  • Full sun
Aspect

East–facing or South–facing or West–facing

Exposure
Exposed
Hardiness
H7
Botanical details
Family
Asteraceae
Native to GB / Ireland
No
Foliage
Deciduous
Habit
Bushy
Genus

Aster can be perennials, annuals or subshrubs, mostly with narrow leaves, and solitary or clustered, daisy-like flowers

Name status

Accepted

How to grow

Cultivation

Grow in moderately fertile, well-drained soil in an open sunny position; thrives in alkaline soil

Propagation

Propagate by division in spring or root basal cuttings in spring

Suggested planting locations and garden types
  • Cottage and informal garden
  • Wildlife gardens
  • Flower borders and beds
  • Cut flowers
Pruning

Cut back after flowering

Pests

May be susceptible to slugs, snails, leaf and bud eelworms and aphids

Diseases

May be susceptible to wilts, leaf spot and grey moulds

Get involved

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