Cabbage Tree – cabbage tree that marks every wet hollow in the land

cabbage tree that marks every wet hollow in the land

Size: Height: 10–20 m
Lifespan: 100–200 years
Diet: Not applicable as this is a tree. Absorbs nutrients through roots. Prefers damp, fertile soils with full sun. Tolerates waterlogging, drought, and salt spray. Found in wetlands.
Habitat: Swamps, riverbanks, coastal cliffs, and open forest. Prefers damp, fertile soils with full sun. Tolerates waterlogging, drought, and salt spray. Often forms distinctive stands in wetlands and along stream margins.
Range: Found throughout New Zealand from Northland to Stewart Island. Most common in lowland and coastal areas. Also found on the Chatham Islands. Planted widely in gardens and parks.
Endemism: Endemic
Main Threats: Habitat loss from wetland drainage and land clearance is the primary threat. Disease (sudden decline) caused by phytoplasma has killed many trees. Browsing by livestock and possums. Climate change affects coastal habitats.
Population: Populations have declined due to sudden decline disease but remain widespread. The species is common in both wild and cultivated settings. It is not considered threatened overall. Localised declines have occurred. Protection of wetlands is important.
Conservation Status: Not Threatened
Human Risk: harmless
Handling Note: native monocot tree, safe to handle
Conservation Note: Endemic tree or shrub; widespread in lowland and montane habitats throughout New Zealand.
Assessment: NZTCS Vascular Plants (2023)
Te Ao Māori: In Māori tradition, tī kōuka was a valuable source of food, fibre, and medicine. The roots were roasted and eaten. The leaves were woven into baskets, mats, and rain capes. The fibres were used for cordage and fishing lines. The nectar from flowers was collected as a sweet drink. The soft wood was used for fire-making by rubbing sticks. The tree was often planted near settlements.

It is not just a tree. The cabbage tree looks like a giant grass. It has grass-like leaves and a tall, branching form that makes it instantly recognisable. Early European settlers used the leaves as cabbage. This gave the tree its common name. The Māori name Tī kōuka refers to its use for food and fibre. A tree that fed the people. The cabbage tree grows in wetlands, along riverbanks, on coastal cliffs, and in open forest. It is extremely hardy. It tolerates waterlogging, drought, salt spray, and fire. It is often the first tree to regrow after a fire. Its underground stems send up new shoots. A tree that rises from the ashes. The trunk is soft and fibrous. It reaches up to twenty metres in height. It often branches into several heads. The leaves are long, narrow, and sword-shaped. They are up to a metre in length. They form a dramatic crown. The flowers are massive, creamy-white spikes. They appear in late spring. They fill the air with a sweet scent. The fruit is small, white, and berry-like. Birds eat it. Sudden decline disease has hit the cabbage tree hard. This phytoplasma causes the tree to die back. Thousands of trees have died, especially in the north. But the tree persists. It regenerates from seed and from underground stems. A tree that refuses to give up. To see a cabbage tree is to see a survivor. The swamp is wet. The cabbage tree stands. Its grass-like leaves rustle. Its fibrous trunk is dark against the sky. The disease has killed its neighbours. It is still standing. It does not know it is a survivor. It just grows. It has been here for millennia. It will be here as long as the wetlands remain wet.