Grevillea robusta

silk oak
The largest Grevillea, a fast growing, upright tree. Thrives on neglect. Many bronze-yellow flowers in late spring early summer.
Grevillea robusta
height 30–50ft
width 15–25ft
tolerates Cold, Drought, Neglect, Wind
water
needs		 Lowest
water
info		 Grevilleas are drought tolerant, but they’ll want infrequent additional summer water at least every couple of weeks once established. They prefer well-drained soil, but they’re less picky than some of the other proteaceous plants.

After a couple years of good watering to establish, this grevillea often won’t need supplemental water if it is within a few miles of the coast.
hardy
to		 18F
exposure Part Shade – Full Sun
indoor
outdoor		 Outdoor
drainage In Ground: Cactus Mix, In Pots: Cactus Mix, Tolerates Heavy Soil, Tolerates Sandy Soil
fertilizing Low Needs
origin E Australia
california
native		 No

Outdoor Exposure Guide

Growing Notes

This plant is known to be mildly invasive in some areas, though it does not seem particularly problematic along the central coast of California.

Special Interest

Commercially farmed and logged in Madagascar, where there are entire ‘forests’ of this tree, as it is fast growing and reproduces easily.