Kowhai

Sophora tetraptera

Iconic small New Zealand tree with cascading clusters of bright yellow tubular flowers in early spring — the country's unofficial national flower.

Hardiness ratings

Kowhai hardiness across the four zone systems
SystemRatingTemperature rangeHow 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 4–6 0 °C to 15 °C Plant tolerates down to this zone

Growing notes

  • Native to New Zealand
  • Major nectar source for tūī and korimako (bellbird) when in flower
  • Seeds and bark are toxic if ingested

Categories

Related plants

Cross-check Kowhai against your zones

Reference

Kowhai on Wikipedia