Warrigal greens (Tetragonia tetragonioides) – hardiness zones in USDA, RHS, Canadian & Australian systems

Sprawling coastal leafy green from Australia and New Zealand, used like spinach.

Hardiness ratings

Warrigal greens 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	H3	−5 °C to 1 °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 3–7	−5 °C and warmer	Plant tolerates down to this zone

Vigorous leafy green; very heat-, salt- and drought-tolerant
Blanch the leaves and discard the water before eating — they contain oxalates and should not be eaten raw in quantity
Frost cuts back top growth but it self-seeds readily and can become weedy if left unchecked