Grevillea 'Canberra Gem'

RHS Plant Profile

spider flower 'Canberra Gem'

Synonyms

Grevillea rosmarinifolia 'Canberra Gem'
Grevillea banksii 'Canberra Hybrid'
Grevillea Canberra hybrid

Conservatory Greenhouse Shrubs

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A vigorous medium-sized evergreen shrub of rounded habit, with rigid, linear leaves, and bright deep pink flowers in clusters from late winter to late summer

Position

Full sun

Soil Types

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

Loam Sand

Moisture: Well–drained
pH: Acid or Neutral

Position

Full sun

Aspect: East–facing or 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: Proteaceae
Native to GB/Ireland: No
Foliage: Evergreen
Habit: Bushy
Potentially harmful: Skin irritant/allergen. Wear gloves and other protective equipment when handling Pets: Skin irritant/allergen. For further information and contact numbers regarding pets, see the HTA guide to potentially harmful plants
Genus: Grevillea can be evergreen shrubs or trees, with alternate, simple or pinnately divided leaves and petal-less flowers consisting of a colourful calyx tube with protruding style, borne in racemes or panicles
Name Status: Accepted

How to Grow

Cultivation

Grow outdoors in acid to neutral well-drained soil. Grow under glass in lime-free compost with added grit in fill light. May need restrictive pruning under glass

Propagation

Propagate by seed, semi-hardwood cuttings or graft

Suggested planting locations and garden types

City and courtyard gardens
Flower borders and beds
Wall side borders

Pruning

Pruning group 1 outdoors, but more rigorous pruning may be necessary indoors to restrict size

Pests

Generally pest-free

Diseases

May be susceptible to honey fungus (rarely)