Nguyen et al. New Zealand Journal of Forestry Science (2021) 51:8 https://doi.org/10.33494/nzjfs512021x157x E-ISSN: 1179-5395 published on-line: 22/07/2021 Research Article Open Access New Zealand Journal of Forestry Science A review of kōwhai (Sophora spp.) and its potential for commercial forestry Lisa Nguyen1*, Karen Bayne2, and Clemens Altaner1 1School of Forestry, University of Canterbury, 20 Kirkwood Avenue, Upper Riccarton, Christchurch 8041, New Zealand 2Scion, 10 Kyle Street, Riccarton, Christchurch 8011, New Zealand *Corresponding author:
[email protected] (Received for publication 21 April 2021; accepted in revised form 3 July 2021) Abstract Background: Demand for imported sawn timbers in New Zealand has increased over the last decade,Sophora reflecting spp.) arethe Newlack of New Zealand-grown, naturally durable timber in the domestic market. Therefore, a market opportunity exists for heartwood.sustainably grown, naturally durable timbers in New Zealand for specialty applications. Kōwhai ( Zealand native tree species, known for their bright, yellow flowers and reported to produce coloured, naturally durable Methods: Information on kōwhai was collated from literature, focusing on their potential for commercial forestry. The taxonomic relationships, species descriptions, establishment, and growth rates of kōwhai were examined, along with timber properties and historical uses, as well as medicinal applications. The review identified potential market opportunities for Results:kōwhai and key areas for further research.Sophora Kōwhai refers to eight different species that are endemic to New Zealand. Kōwhai is easily established and the different species hybridise readily. While growth andTectona form of grandis kōwhai varies with species, site, and management, examples of straight single-stemmed trees and annual diameter increments exceeding 20 mm have been found.