Griselinia littoralis Green Horizon ('Whenuapai'PBR)

RHS Plant Profile
New Zealand broadleaf [Green Horizon]

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Synonyms

Griselinia littoralis 'Whenuapai'PBR

Shrubs
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A large, fast-growing evergreen shrub with bright mid-green, leathery, broadly oval leaves. Flowers are yellow-green and very small and inconspicuous

Position

Full sun

Soil Types

Chalk, Clay, Loam, Sand

Max Height

4-8 metres

Max Spread

2.5-4 metres

Size

Time to Maturity
10–20 years
Max Spread
2.5-4 metres
Max Height
4-8 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
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
Griseliniaceae
Native to GB/Ireland
No
Foliage
Evergreen
Habit
Bushy
Genus
Griselinia are upright evergreen shrubs with simple, ovate leaves and tiny yellow-green flowers, male and female on separate plants
Name Status
Trade

How to Grow

Cultivation

Grow in light, well-drained fertile soil with protection from cold drying winds. Ideal coastal windbreak in milder climates

Propagation

Propagate by semi-ripe cuttings

Suggested planting locations and garden types

  • City and courtyard gardens
  • Cottage and informal garden
  • Coastal
  • Hedging and screens
  • Wall side borders

Pruning

Pruning group 9

Pests

Generally pest-free

Diseases

May be susceptible to a leaf spot and honey fungus (rarely)