Silky Oak
Grevillea robusta
Proteaceae · broadleaf evergreen tree · introduced
Last updated
Data Coverage 2 of 6 dimensions
Quick Facts
Height
115 ft
Spread
49 ft
Growth Rate
Fast
Light
Full Sun
Soil
Adaptable
Water
Moderate
Hardiness
Zone Zones 8a–8b
Bloom Time
Jun 15-Aug 15
Origin
Australia (Queensland and New South Wales); considered a
Phenological Calendar
| Stage | Typical Window |
|---|---|
| New growth flush BBCH 11 | Feb 15-Mar 15 |
| Bloom start BBCH 61 | Jun 15-Aug 15 |
| Bloom end / petal fall BBCH 69 | Jul 15-Aug 31 |
| Fruit/seed development BBCH 71 | Sep 1-Nov 30 |
| Fruit/seed maturity BBCH 85 | Dec 1-Feb 28 |