Grevillea robusta
Silky oak · also Southern silky oak, Silk oak tree, Silver oak
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A tall, upright tree native to eastern coastal Australia, featuring fern-like leaves with silvery undersides, and bright orange-yellow flowers that attract birds and bats. It is fast-growing, drought-resistant, and tolerant of poor soils, making it suitable as a shade or street tree, but its allelopathic properties and invasiveness in some regions warrant careful consideration.
Where it grows
Trees in each city's inventory, with the share of that city's named trees this species accounts for.
- 2,5080.17%——
- 1,2420.27%35 yr18 in
- 1870.05%—13 in
- 730.04%—15 in
- 660.05%—14 in
- 480.03%—3.8 in
- 20.01%—14 in
Traits
- Foliage
- Evergreen
- Mature height
- 32.8–98.4 ft
- Canopy spread
- 60 ft
- Growth rate
- Fast
- Sun
- Full sun
- Soil
- Well-drained, Sandy
- Water needs
- Low
- Drought tolerance
- High
- Pollution tolerance
- Moderate
- Wildlife value
- High
- Blooms
- Oct, Nov, Dec
Trunk diameters across every city: median 18 in, mean 19 in, 90th percentile 30 in. Measured at breast height, as published by each inventory.
Native range
Terrestrial ecoregions where this species is native. Trees in the dataset mostly stand well outside it.
Tropical & Subtropical Moist Broadleaf Forests
- Queensland tropical rain forests
Temperate Broadleaf & Mixed Forests
- Southeast Australia temperate forests
Other Grevillea in the catalogue
2 of the top 2,000 species are in this genus.
