Kōwhai

Sophora microphylla · Fabaceae · also Kowhai, Weeping kōwhai, Small-leaved kōwhai

New Zealand's best-loved flowering tree, a small tree to 25 m (usually much less) with tiny leaflets and hanging golden flowers in late winter and spring that tūī and bellbirds flock to. Young plants pass through a tangled divaricating stage. It is semi-deciduous, dropping leaves at flowering. All parts, especially the yellow seeds, are poisonous. Sophora tetraptera, the large-leaved kōwhai, is the other common planted species and nursery plants are often hybrids.

Broadleaf, loses its leaves in winterMedium growthFull sunModerate water
Kōwhai
Wikimedia Commons, file Sophora_microphylla_-_John_Barkla_-_93710499.jpeg (see file page for author and licence)

Where it stands

Native

This tree evolved here, and local wildlife depends on it.

  • 🇨🇱 Chile · Recorded native in central and southern Chile by WCVPsource
  • 🇳🇿 New Zealand · Endemic; Not Threatened nationally (2023) but Regionally Vulnerable in Auckland and Declining in Northlandsource

Adapted

Introduced, but it handles this climate and has not shown a habit of spreading.

  • 🇬🇧 United Kingdom · Garden tree in mild areas; introduced per WCVPsource

Care

Plant in sun on drained soil; it can be planted on open sites without nurse cover. Water the first summer; stake in windy places. Prune lightly after flowering if needed. Kōwhai moth caterpillars defoliate trees in summer but they recover. Seed germinates easily if the hard coat is nicked. Keep seeds away from children.

Benefits

FlowersBirdsPollinatorsFixes nitrogenFits small spacesWildlife

Good for

Small yardStreet treeparksStreambanksReforestation

Watch out for

Toxic parts