Chatham Islands tree daisy

Olearia traversiorum

New Zealand daisy-family tree from the wind-blasted Chatham Islands, with glossy leathery dark green leaves and exceptional tolerance of salt wind. Among the most effective coastal windbreaks available for mild maritime climates.

Hardiness ratings

Chatham Islands tree daisy 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 9 −1 °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

Growing notes

  • Among the most effective coastal windbreaks available for mild maritime climates — fast growing, salt tolerant, wind tolerant, evergreen, dense canopy at ground level
  • Endemic to the Chatham Islands east of New Zealand, where it forms the dominant tree cover on islands exposed to the constant Roaring Forties westerly winds
  • Member of the Asteraceae (daisy family) — small white daisy flowers in early summer (mostly insignificant; planted for shelter not bloom)
  • Frost-tender — strictly a mild-climate plant, succeeds in coastal southern UK, Ireland, southern Australia, and similar maritime climates

Categories

Related plants

Cross-check Chatham Islands tree daisy against your zones

Reference

Chatham Islands tree daisy on Wikipedia