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Tropicals, Woody > Grevillea > Grevillea robusta > Grevillea robusta

Grevillea robusta


Silky Oak




Origin:  Native to Queensland and New South Wales, Australia.
Family
Proteaceae
Genus
Grevillea
Species
robusta
Category
Tropicals, Woody
Type
Tree (evergreen)
Pronunciation
USDA Hardiness Zone
11
Canadian Hardiness Zone
Requires cool season protection under glass.
RHS Hardiness Zone
H1c
Temperature (°C)
4 - 7
Temperature (°F)
35 - 45
Height
30-40 m
Spread
4 - 8 M
Photographs
Description and Growing Information
Flowering Period
General Description
In order to survive in poor soils Grevillea have evolved with proteoid roots. These roots which develop each season, grow into the top levels of the soil to extract nutrients.
Landscape
Patio and container plants.
Cultivation
A marginally frost hardy plant that prefers acidic growing conditions and is intolerant of wet soils. Grevillea are particularly intolerant of phosphorous so a fertilizer low in this nutrient is a must.
Growth
Medium
ID Characteristic
Deep green fern-like leaves with pale undersides. Racemes of tubular yellow flowers.
Pests
No major issues.
Propagation
By seed grafting or semi-hardood cuttings.
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