The Temperate Database is in the process of being updated, with new records being added and old ones being checked and brought up to date where necessary. This record has not yet been checked and updated.
Common Name: Kowhai
Sophora tetraptera is a Evergreen Tree up to 10.00 metres tall.
It has miscellaneous uses.
The plant contains cytosine, which resembles nicotine and is similarly toxic[
New Zealand and S. America - Chile.
Streamsides, forest margins and lowland on North Island in New Zealand, from East Cape to latitude 40° 30's[
Succeeds in a well-drained moderately fertile soil in full sun[
]. Requires a warm sheltered position[
]. It grows best in the warmer areas of the country where the wood will be more readily ripened and better able to withstand winter cold[
Hardy to about -10°c[
], it succeeds in the open in southern and south-western Britain but is best grown against a wall elsewhere[
]. Plants are of slow to moderate growth[
In good summers plants set abundant seed in this country[
Plants should be container-grown and planted out whilst young, older plants do not transplant well[
Plants in this genus are notably resistant to honey fungus[
This species has a symbiotic relationship with certain soil bacteria, these bacteria form nodules on the roots and fix atmospheric nitrogen. Some of this nitrogen is utilized by the growing plant but some can also be used by other plants growing nearby[
Wood - compact, dense, heavy, of great strength, tough, elastic, extremely durable. Used for bearings, turnery, cabinet work, ornamental uses etc[
Seed - best sown as soon as it is ripe in a greenhouse[
]. Pre-soak stored seed for 12 hours in hot (not boiling) water and sow in late winter in a greenhouse[
]. Prick out the seedlings as soon as they are large enough to handle into individual pots in the greenhouse, and grow them on for 2 years under protected conditions. Plant them out into their permanent positions in early summer of their third year.
Cuttings of young shoots with a heel, mid summer in a frame[