Eurybia radula

RHS Plant Profile

rough wood aster

Synonyms

Aster radula

Herbaceous Perennial

Buy this from Plant Nurseries
6 Suppliers

A vigorous, clump-forming deciduous herbaceous perennial with narrow, lance-shaped green foliage and upright stems of daisy-like violet-purple flowers which appear in the summer and flower through until autumn

Position

Full sun, Partial shade

Soil Types

Chalk, Clay, Loam, Sand

Max Height

0.1-0.5 metres

Max Spread

0.1-0.5 metres

Size

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

Growing Conditions

Chalk Clay Loam Sand

Moisture: Moist but well–drained or Well–drained
pH: Acid or Alkaline or Neutral

Position

Full sun Partial shade

Aspect: East–facing or North–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): H4

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: Eurybia is a genus of woody perennials. Leaf shape can differ between varieties and flowers can be white or light pink to purple with yellow corona.
Name Status: Accepted
Plant Range: E Canada, NE USA

How to Grow

Cultivation

Grow in moist but well-drained humus-rich soil in full sun or part shade. Apply a thick mulch in autumn

Propagation

Propagate by division. Divide every few years to maintain vigour

Suggested planting locations and garden types

Cottage and informal garden
Gravel garden
Patio and container plants
Cut flowers
Flower borders and beds

Pruning

Cut back in early spring

Pests

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

Diseases

May be susceptible to grey moulds, fusarium wilt and a leaf spot