Silky Oak
Grevillea robusta
Proteaceae · broadleaf evergreen tree · introduced
Last updated
Data Maturity Baseline
This profile contains verified botanical data. Regional field notes and expert review are in progress.
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 |