Aster amellus 'Sternkugel'

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Synonyms

Aster 'Sternkugel'

Herbaceous Perennial

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Clump-forming, hairy perennial up to 60cm tall, upight in habit, with lance-shaped, mid-green leaves, and loose clusters of deep purple flowerheads with yellow centres, open from late summer to autumn

Position

Full sun

Soil Types

Chalk, Clay, Loam, Sand

Max Height

0.5-1 metres

Max Spread

0.5-1 metres

Size

Time to Maturity: 2–5 years
Max Spread: 0.5-1 metres
Max Height: 0.5-1 metres

Growing Conditions

Chalk Clay Loam Sand

Moisture: Well–drained
pH: Acid or Alkaline or Neutral

Position

Full sun

Aspect: South–facing or West–facing or East–facing
Exposure: Exposed or Sheltered
Hardiness

Hardiness Ratings

All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets

H1A: under glass all year (>15C)
H1B: can be grown outside in the summer (10 - 15)
H1C: can be grown outside in the summer (5 - 10)
H2: tolerant of low temperatures, but not surviving being frozen (1 to 5)
H3: hardy in coastal and relatively mild parts of the UK (-5 to 1)
H4: hardy through most of the UK (-10 to -5)
H5: hardy in most places throughout the UK even in severe winters (-15 to -10)
H6: hardy in all of UK and northern Europe (-20 to -15)
H7: hardy in the severest European continental climates (< -20): H7

Colour & Scent

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Asteraceae
Native to GB/Ireland: No
Foliage: Deciduous
Habit: Clump forming
Genus: Aster can be perennials, annuals or subshrubs, mostly with narrow leaves, and solitary or clustered, daisy-like flowers
Name Status: Unresolved

How to Grow

Cultivation

Grow in well-drained, moderately fertile soil in an open, sunny position. See aster cultivation

Propagation

Propagate by division in spring or root softwood basal cuttings in spring

Suggested planting locations and garden types

City and courtyard gardens
Coastal
Cottage and informal garden
Patio and container plants
Cut flowers
Flower borders and beds
Underplanting of roses and shrubs

Pruning

Deadhead spent flowers to tidy, cut back stem close to the ground in late autumn

Pests

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

Diseases

Asters may be susceptible to Verticillium wilt, Powdery mildews and grey moulds