Skip to content
Log inStart trial

Silk Oak

Grevillea Robusta

Design with this plant

Overview

The Silk Oak, or Grevillea robusta, is an elegant evergreen with fern-like foliage, growing up to 100 feet tall with a spread of 20-30 feet. Its nectar-rich, orange blossoms emerge in spring, attracting pollinators. Native to Australia, it thrives in USDA Zones 9-11, preferring full sun and well-drained soil. This fast-growing tree is drought-tolerant, making it an ideal focal piece for large landscapes requiring minimal maintenance.

Sun FullWater Low, Very LowZones 8–10Type Tree
Silk Oak (Grevillea Robusta) — scientifically known as Grevillea robusta; and it's recommended to plant it away from areas with heavy pedestrian, image 57

Culture

Sun
Full
Water
Low, Very Low
USDA zones
8–10

Shape & size

Mature height
50–60 Ft.
Mature width
30–40 Ft.

Classification

Type
Tree
Family
Proteaceae

See full data, regional cultivation notes, and design tools. Build a client presentation around this plant.

Start your 14-day trial

Photos (98)

Silk Oak (Grevillea Robusta) — Native to the eastern coastal regions of Australia
Silk Oak (Grevillea Robusta) — gold and yellow flowers in the garden; is a majestic evergreen tree renowned for its ornamental qualities and fast-growing nature
Silk Oak (Grevillea Robusta) — provide a stunning contrast against the deep green
Silk Oak (Grevillea Robusta) — growing up to 100 feet tall with a spread of 20-30 feet
Silk Oak (Grevillea Robusta) — the foliage may cause skin irritation on sensitive individuals; bottlebrush-like flowers bloom abundantly, image 70
Silk Oak (Grevillea Robusta) — This fast-growing tree is drought-tolerant; scientifically known as Grevillea robusta
Silk Oak (Grevillea Robusta) — making it an ideal focal piece for large landscapes requiring minimal maintenance; growing up to 6 inches long, image 56
Silk Oak (Grevillea Robusta) — growing up to 100 feet tall with a spread of 20-30 feet; the Silk Oak's fern-like foliage presents a delicate texture, image 77
Silk Oak (Grevillea Robusta) — bottlebrush-like flowers bloom abundantly; making it an ideal focal piece for large landscapes requiring minimal maintenance
Silk Oak (Grevillea Robusta) — as it has an aggressive root system that can damage nearby pavements or structures
Silk Oak (Grevillea Robusta) — Native to Australia, it thrives in USDA Zones 9-11, preferring full sun and well-drained soil
Silk Oak (Grevillea Robusta) — scientifically known as Grevillea robusta
Silk Oak (Grevillea Robusta) — is a majestic evergreen tree renowned for its ornamental qualities and fast-growing nature; its nectar-rich, orange blossoms
Silk Oak (Grevillea Robusta) — growing up to 100 feet tall with a spread of 20-30 feet; the Silk Oak's fern-like foliage presents a delicate texture
Silk Oak (Grevillea Robusta) — is an elegant evergreen with fern-like foliage; native to Australia, it thrives in USDA Zones 9-11, preferring full sun and
Silk Oak (Grevillea Robusta) — tree for full; regular pruning will help maintain its shape and prevent excessive spread, image 75
Silk Oak (Grevillea Robusta) — The Silk Oak's fern-like foliage presents a delicate texture; tree with gold and yellow blooms, image 61
Silk Oak (Grevillea Robusta) — this tree can reach impressive heights up to 100 feet with a canopy spread of about 30 feet when mature
Silk Oak (Grevillea Robusta) — dissected leaves.<br><br>For landscape purposes
Silk Oak (Grevillea Robusta) — attracting pollinators such as hummingbirds and bees, image 63
Silk Oak (Grevillea Robusta) — growing up to 100 feet tall with a spread of 20-30 feet; the Silk Oak's fern-like foliage presents a delicate texture, image 52
Silk Oak (Grevillea Robusta) — tree for full; regular pruning will help maintain its shape and prevent excessive spread
Silk Oak (Grevillea Robusta) — growing up to 6 inches long; the foliage may cause skin irritation on sensitive individuals
Silk Oak (Grevillea Robusta) — is a majestic evergreen tree renowned for its ornamental qualities and fast-growing nature
Photographs by 12 contributors

Related plants

Banksia (Banksia Cvs.) — shrub for full; paired with a need for only occasional pruning to remove spent flower spikes and old growth

Shrub

Banksia

Banksia Cvs.

FullUSDA 9–11
Big Nellie Hakea (Hakea Archaeoides) — red clusters of flowers in winter and spring

Shrub

Big Nellie Hakea

Hakea Archaeoides

FullUSDA 9–11
Bull Banksia (Banksia Grandis) — Resistant to drought, it's a low-maintenance choice for impactful landscapes

Shrub

Bull Banksia

Banksia Grandis

FullUSDA 9–10
Caley's Banksia (Banksia Caleyi) — Banksia caleyi, commonly known as Caley's Banksia, is an alluring shrub reaching up to 10 feet in height

Shrub

Caley's Banksia

Banksia Caleyi

FullUSDA 9–11
Chilean Firetree (Embothrium Coccineum) — commonly known as the Chilean Firetree or Notro; provided they are well-drained

Tree

Chilean Firetree

Embothrium Coccineum

FullUSDA 7–10
Coastal Gem Grevillea (Grevillea Lanigera 'Coastal Gem') — Grevillea lanigera 'Coastal Gem' is a low-growing

Ground cover

Coastal Gem Grevillea

Grevillea Lanigera 'Coastal Gem'

FullUSDA 9–10