Rosemary grevillea (Grevillea rosmarinifolia) – hardiness zones in USDA, RHS, Canadian & Australian systems

Bushy upright grevillea with rosemary-like needle leaves and showy red and cream spider-like flowers from late winter through spring.

Hardiness ratings

Rosemary grevillea hardiness across the four zone systems
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

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