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Cyathea medullaris

Cyathea medullaris

Mamaku

Height
5m
Width
2m
Tree shape

Estimated size at 10 years

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Stock Info

Standard height
The height of the clear trunk before the graft and branching begins.
Low worked (LW)
Grafted, or allowed to branch, much lower on the trunk.
Clear trunk (CT) vs Bushy
Clear trunk has its branches trimmed up. Bushy is allowed to grow out from lower down.
Cloud pruned
Foliage shaped into distinct, rounded “clouds” on carefully spaced branches.

Cyathea medullaris is the tallest-growing of New Zealand's tree ferns and is characterized by its distinctive tall, black trunk. Cyathea medullaris prefers moisture-rich soil and shelter from wind. It naturally grows in lowland and hilly forest terrain up to about 600m altitude and on partially open sites throughout the country. However, it does not tolerate heavy frosts, major drought, or strong winds. Cyathea medullaris has a very wide, almost horizontal, frond spread (about 10m to 14m when fully grown), making it best for larger gardens. Cyathea medullaris is evergreen and native to New Zealand in the North Island, South Island, and Chatham Islands and also in Fiji, the Marquesas Islands, Pitcairn Island, Society Island, and Tubuai Island.

Also known as

Black Tree Fern·Sphaeropteris medullaris

Uses

  • Shade

Origin

  • Native

City Recommendations

  • Christchurch
  • Wellington
  • Napier
  • New Plymouth
  • Whanganui

More about Cyathea medullaris

Plant Details

Foliage Type
  • Evergreen
Position
  • Full shade
  • Partial shade

Seasonal Colour

Foliage

Stem

This is a general guide. When a plant flowers, fruits and colours up depends on the climate where you live and on the season. If timing matters, please reach out to our team.

Foliage Type

Evergreen plants retain foliage year-round but still shed and replace some leaves gradually as part of their normal growth cycle, rather than losing them all at once.

Deciduous plants shed all their leaves for part of the year (usually in autumn and winter), usually in response to colder temperatures or dry seasons, often producing seasonal colour before leaf drop.

Semi-evergreen plants sit between the two, keeping most of their foliage but losing some or all leaves briefly under cooler or drier conditions before quickly regrowing them.

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