Callistemon viridiflorus

RHS Plant Profile
green bottlebrush

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green bottlebrush RHS

Synonyms

Callistemon salignus var. viridiflorus

Shrubs
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A hardier bottlebrush with an arching but compact habit, sharply pointed leaves and yellow-green flowers in mid- to late summer. The woody seedcases can persist for several years

Position

Full sun

Soil Types

Clay, Loam, Sand

Max Height

1.5-2.5 metres

Max Spread

1.5-2.5 metres

Size

Time to Maturity
5–10 years
Max Spread
1.5-2.5 metres
Max Height
1.5-2.5 metres

Growing Conditions

Clay Loam Sand
Moisture
Moist but well–drained
pH
Acid or Neutral

Position

Full sun
Aspect
West–facing or East–facing or South–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)
H3

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Myrtaceae
Native to GB/Ireland
No
Foliage
Evergreen
Habit
Bushy
Genus
Callistemon are evergreen shrubs with aromatic, linear to lance-shaped leaves and bottlebrush-like spikes of flowers in which the long colourful stamens are prominent
Name Status
Correct
Plant Range
Tasmania

How to Grow

Cultivation

Grow in full sun in a moist but well-drained acid or neutral soil

Propagation

Propagate by seed, surface sown onto moist compost in spring, or from semi-hardwood cuttings

Suggested planting locations and garden types

  • City and courtyard gardens
  • Coastal
  • Mediterranean climate plants
  • Wall side borders

Pruning

Pruning group 8

Pests

May be susceptible to scale insect, mealy bug and glasshouse red spider mite

Diseases

May be susceptible to honey fungus