Grevillea robusta (Southern silky oak, "Hagoromonoki")

Japanese name: ハゴロモノキ （羽衣木）
Scientific name: Grevillea robusta

[Overview]
An evergreen tree growing as tall as 40 m.
It grows fast and forms a conical crown.
The leaves are alternate, about 30 cm long and 15 cm wide, and pinnately divided into 11–31 lobes.
The lobes are further divided.
When new leaves unfold, the old leaves drop.
Racemes about 12–15 cm long are produced, with the flowers borne on one side, forming a flower spike like a toothbrush.
The flowers are orange to golden and have no petals; the tip of the tubular perianth opens and the style projects far out.
The fruit is a follicle.

[Uses]
The wood is used for furniture and the like.

[Cultivation]
Propagate by cuttings.
Established mature trees tolerate temperatures down to -8°C, so it can overwinter outdoors in areas without frost.
If it is kept at 10°C or above in winter it can keep growing without resting, so bring potted plants into a sunny place indoors in winter.
It prefers a sunny place with well-drained soil.
Avoid places exposed to cold winter winds.
For potted plants, and for plants in the ground less than 2 years after planting, water thoroughly when the soil surface dries from spring to autumn, and water sparingly in winter.
For established plants in the ground, rainfall is sufficient.
Apply organic fertilizer around the plant as fertilizer in winter.
There are no particular pests or diseases.

View this page in Japanese (日本語)