Bushy upright grevillea with rosemary-like needle leaves and showy red and cream spider-like flowers from late winter through spring.
Hardiness ratings
| System | Rating | Temperature range | How to read it |
|---|---|---|---|
| USDA hardiness zone | Zone 8–10 | −12.2 °C to 4.4 °C | Plant tolerates down to this zone |
| RHS hardiness rating | H4 | −10 °C to −5 °C | Plant needs at least this level of cold tolerance |
| Canadian plant hardiness zone | Zone 8–9 | −7 °C and warmer | Plant tolerates down to this zone |
| Australian (ANBG) zone | Zone 3–6 | −5 °C to 15 °C | Plant tolerates down to this zone |
About Rosemary grevillea
Grevilleas are members of the Proteaceae, an ancient family with a distribution across Australia, southern Africa and South America that reflects the breakup of the supercontinent Gondwana. Their most important horticultural quirk follows from that: they evolved on some of the oldest and most phosphorus-poor soils on earth, and produce dense cluster roots to extract what little is present. Standard phosphorus-rich fertiliser can therefore poison them. Their brush-like flowers are rich in nectar and are a significant food source for honeyeaters and other nectar-feeding birds.
Growing notes
- Reliable honeyeater and native bee forage
- Among the most frost-tolerant grevilleas — succeeds in cooler southern Australian gardens where most grevilleas struggle
- Makes an excellent informal hedge, dense enough for nesting habitat
- Drought tolerant once established
Categories
Related plants
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