Botanical name:

Urtica ferox

Common name(s):

Ongaonga, Tree Nettle

About:

The tree nettle, scientifically known as Urtica ferox, thrives abundantly in temperate bush environments found in lowland regions. These areas encompass diverse habitats, including stock-damaged bush, various types of scrubland, and the edges of forests. This remarkable plant is capable of withstanding surprisingly low temperatures, dropping down to minus eight degrees Celsius. In regions that experience colder climates, the tree nettle exhibits a seasonal adaptation by shedding its leaves during the winter months. Importantly, Urtica ferox serves as the primary food source for the larvae of two notable butterfly species in New Zealand: the New Zealand Red Admiral butterfly, known as Bassaris gonerilla, and the Yellow Admiral butterfly, scientifically referred to as Vanessa itea. It is crucial to note that the tree nettle is recognised as one of New Zealand's most poisonous native plants, so caution is advised when encountering it.

Natural habitat:

Commonly found in the fringes and edges of diverse bushland areas. This species is primarily located in coastal regions as well as in lowland forest margins and various types of shrublands.

Growing environment:

Frost, Salt, Wind & Coastal tolerant.

Endemic distribution:

Found throughout New Zealand’s North and South Islands reaching Otago as its southern limit.

Height: 3m

Flowering: 

November – March with a green coloured flower/s

Fruiting:

December - May

Uses:

Forests.

How to grow:

Easily grown from fresh seed though not advisable to be cultivated due to its poisonous nature.

** Seed germinates without pre treatment. Sow seed direct & keep moist until germination is complete.