Olearia macrodonta

RHS Plant Profile
New Zealand holly

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New Zealand holly RHS 2002
New Zealand holly RHS
New Zealand holly RHS
New Zealand holly RHS

Synonyms

Olearia dentata

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A vigorous, evergreen upright shrub or small tree to 6m in height, with spiny-toothed, ovate, grey-green leaves, white-felted beneath, up to 9cm in length. Small, fragrant white flowers are borne in large clusters in 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 North–facing or West–facing or East–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
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
Olearia can be evergreen shrubs, small trees or herbaceous perennials, with simple, leathery, toothed or entire leaves and corymbs of daisy-like flower-heads
Name Status
Correct
Plant Range
New Zealand

How to Grow

Cultivation

Grow in well-drained soil in full sun

Propagation

Propagate by semi-hardwood cuttings

Suggested planting locations and garden types

  • Coastal
  • Architectural
  • Cottage and informal garden
  • Mediterranean climate plants
  • Wildlife gardens
  • Low Maintenance
  • Hedging and screens
  • Wall side borders

Pruning

Pruning group 9

Pests

Generally pest-free

Diseases

Generally disease-free but may be susceptible to honey fungus (rarely)