Cassinia 'Ward Silver'

RHS Plant Profile
cottonwood 'Ward Silver'

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cottonwood 'Ward Silver' RHS

Synonyms

Cassinia elichyrysum 'Ward Silver'

Shrubs
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A medium-sized evergreen shrub with fine, silvery foliage. Honey-scented white flowers appear from May through until July.

Position

Full sun

Soil Types

Loam, Sand

Max Height

1-1.5 metres

Max Spread

0.5-1 metres

Size

Time to Maturity
2–5 years
Max Spread
0.5-1 metres
Max Height
1-1.5 metres

Growing Conditions

Loam Sand
Moisture
Well–drained
pH
Acid or 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)
H5
Drought Resistance
Yes

Colour & Scent

Fragrance Flower
Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Asteraceae
Native to GB/Ireland
No
Foliage
Evergreen
Habit
Bushy
Genus
A genus of around 50 species of shrubs or small trees with sometimes sticky, linear-shaped dark green foliage and heads of white, cream, yellow or pink flowers
Name Status
Accepted

How to Grow

Cultivation

Sow seed in spring under glass. Cover with a thin layer of compost keep moist. Prick out seedlings when large enough and grow on under glass for at least their first winter. Plant out in situ late spring or early summer, when the risk of frost has passed. Can also take semi-ripe cuttings in the summer. Grow in well-drained humus-rich soil in full sun. Tolerates salt-laden winds

Propagation

Propagate by seed or semi-ripe cuttings

Suggested planting locations and garden types

  • Cottage and informal garden
  • Mediterranean climate plants
  • Flower borders and beds
  • Wall side borders

Pruning

No pruning required

Pests

Generally pest-free

Diseases

Generally disease-free