Grevillea Robusta - Silky Oak

Grevillea robusta, commonly known as Silky Oak, is the largest species of grevillea and a striking, fast-growing evergreen tree native to eastern Australia. It features  fern-like foliage and produces brilliant golden-orange toothbrush-shaped flowers in spring and early summer. Once a popular street tree, it’s also widely planted for its timber, ornamental value, and as a shade tree in warmer climates.

🌳 Height:
15–30 metres

🌿 Width:
6–10 metres

🔧 Uses:

• Ornamental and shade tree
• Windbreaks and shelterbelts
• Timber production (furniture, veneers, cabinetry)
• Habitat for birds and pollinators
• Erosion control in subtropical zones

🌱 Ideal growing conditions:

• Full sun
• Well-drained, deep soils (prefers loam or sandy loam)
• Warm temperate to subtropical climates

💪 Tolerates:

• Light frost, dry periods, moderate winds
• Slightly poor or rocky soils once established

💧 Drought hardy:
Yes — moderately drought-tolerant once established

❄️ Frost tolerant:
Light frost — young trees can be sensitive, but mature ones handle it better

🧂 Salt tolerant:
Low — not ideal for coastal or saline environments