Aster amellus 'Paul Picton'

RHS Plant Profile

Italian aster 'Paul Picton'

Herbaceous Perennial

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A clump-forming, hairy perennial up to 60cm tall with an upright or arching in habit, with lance-shaped, dark green leaves and dark green to purple stems. Loose clusters of lavender-blue flowerheads maturing to purple-blue, with yellow centres, appear from late summer to autumn. Mildew resistant

Position

Full sun

Soil Types

Chalk, Loam, Sand

Max Height

0.5-1 metres

Max Spread

0.1-0.5 metres

Size

Time to Maturity: 2–5 years
Max Spread: 0.1-0.5 metres
Max Height: 0.5-1 metres

Growing Conditions

Chalk Loam Sand

Moisture: Well–drained
pH: Alkaline or Neutral

Position

Full sun

Aspect: East–facing or South–facing or West–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: Bushy, Clump forming
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

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

Pruning

Cut back after flowering

Pests

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

Diseases

May be susceptible to fusarium wilt, grey moulds and leaf spot. Mildew resistant