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Silk Oak
Scientific Name: Grevillea robusta A. Cunn. ex R. Br.
Synonym:
Family: Proteaceae
Silk Oak (Grevillea  robusta)
A Silk Oak blooming in March
Recommended Temperature Zone:
sunset: 8,9, 12-27
USDA: 9b-11

Frost Tolerance: Young trees might need some protection on frosty nights (less than 24F, -3C)

Sun Exposure: Full sun, young trees tolerate light shade.

Origin: Coastal eastern Australia

Growth Habits: Fast growing evergreen tree, to 60 to 100 feet tall (18-30 m); Dark green delicately dented two-pinnatifid leaves reminding of fern, 6 to 12 inches long (15-30 cm), greyish white or rusty undersides

Watering Needs: Occasional water, fairly drought resistant

Propagation: Seeds in late winter to early spring


Young Silk Oak can be grown for some time as a house plant.

Cultural Practices:
Feed well. It is an excellent, fast growing tree for Phoenix, and the low deserts. The branches break easily during storms, so it might be better not to plant it too close to the house.

Blooming Habits:
Golden-orange bottlebrush-like flowers, 3.2 to 6 inches long (8-15 cm), in the spring, on a 0.8 to 1.2 inches long stalk (2-3 cm).

Fruiting Habits:
Dark brown leathery dehiscent follicles, about 0.8 inch long (2 cm), with one or two flat, winged seeds


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Desert-Tropicals is dedicated to provide gardening advice, gardening ideas, and information about flower of all kind for landscape and collections. We try to check carefully the identification of the plants on the illustrations as well as the other information from the page, but occasionally errors do occur. if you notice anything that needs to be changed please contact us. Thanks.

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