Myoporum insulare including hybrids

Tasmanian ngaio

Family: Myoporaceae

Origin: Australia

Close up of Tasmanian Ngaio flowers being held by a hand.
A small three that is evergreen and comes from Australia. Tasmanian ngaio is often confused with the native ngaio and put into native plantings.
Photo credit: Jonathan Boow

Regional Pest Management Plan (RPMP) status

  • Parkland with Significant Ecological Areas — Site-led
  • Whole region — Sustained control
  • Waitākere Ranges Heritage Area priority status
  • National Pest Plant Accord Species

View more about the RPMP statuses

General description

Large shrub to small tree, multi-branched from base. Leaves are < 12 x 3 cm and elliptic. Flowers are white with purple dots and borne in September – June. Fruit is fleshy and purple.

What you need to know

To help protect our environment:

  • You must not breed, distribute, release or sell Tasmanian ngaio. As Tasmanian ngaio is a National Pest Plant Accord species, these restrictions apply within the Auckland region and across the whole of New Zealand.
  • You must not plant Tasmanian ngaio within the Auckland region, unless you are transferring an existing plant on your land to another location within the boundaries of the same property.
  • You must destroy any Tasmanian ngaio on land that you occupy if it has been planted in breach of the above rules and you are directed to do so by an authorised person.

Habitats

Coastal ecosystems, cliffs, rocky sites.

Dispersal

Seeds dispersed by birds.

Impact on environment

Competes with native coastal plants. May affect genetic diversity of native ngaio (M. laetum) through hybridisation. Toxic to humans and livestock.

Control

Site Management

Follow up treated areas 3 times per year. Encourage natural regeneration of native plants or replant treated areas where possible after 2-3 treatments to establish dense ground cover and minimise reinvasion.

Recommended approaches

Physical control

Method: Dig out.

Plant parts requiring disposal: Seeds.

Disposal options: Remove to greenwaste or landfill if practical.

Biocontrol

Biocontrol is currently not available for this species.

Community agrichemical control recommendations

No qualifications: Cut stump and paste freshly cut base of stems with double strength glyphosate gel.

Basic Growsafe certified: Cut stump and spray freshly cut base with 250ml glyphosate green per 1L of water.

Certified Handler/Experienced agrichemical user: Foliar spray with 100ml glyphosate green per 10L of water and 20ml penetrant.

Caution: When using any herbicide or pesticide please read the label thoroughly to ensure that all instructions and safety requirements are followed.

Hand holding Tasmanian Ngaio stem tip with leaves and flowers.
New leaf tips are green on Tasmanian ngaio and black on native ngaio. It prefers coastal areas that are not subject to heavy frosts.
Photo credit: Jonathan Boow