Carmichaelia stevensonii

RHS Plant Profile
weeping broom

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weeping broom Wolfgang Bopp
weeping broom Wolfgang Bopp
weeping broom Wolfgang Bopp

Synonyms

Chordospartium stevensonii

Shrubs Trees
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A bunch of dead twigs when young but ultimately develops into a small, weeping tree to about 4m with cascading, green but mostly leafless, cord-like branches. Short, hanging sprays of pale purple pea flowers are produced in mid-summer

Position

Full sun

Soil Types

Chalk, Clay, Loam, Sand

Max Height

2.5-4 metres

Max Spread

2.5-4 metres

Size

Time to Maturity
10–20 years
Max Spread
2.5-4 metres
Max Height
2.5-4 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
Exposure
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
Fabaceae
Native to GB/Ireland
No
Foliage
Deciduous
Habit
Pendulous weeping
Genus
Carmichaelia are broom-like deciduous shrubs, mostly with flattened green stems, usually leafless when mature, bearing profuse, small, often fragrant pea-like flowers in summer
Name Status
Correct
Plant Range
New Zealand

How to Grow

Cultivation

Grow in humus-rich, well-drained but not too dry soil in a sunny position with shelter from cold wind and severe frost

Propagation

Propagate by seed sown in a coldframe in autumn, or sow seed that has been scarified or pre-soaked in hot water, in spring. Propagate by semi-ripe cuttings in summer

Suggested planting locations and garden types

  • Coastal
  • Cottage and informal garden
  • Wall side borders

Pruning

Pruning group 1

Pests

Generally pest-free

Diseases

Generally disease-free