Cyathea medularis

Also called "The Black Tree Fern" because of its beautiful deep black trunk that may be as tall as about 20 m and 15-25 cm in diameter.
The crosiers of the new fronds are also deep black, covered with black hair and scales. The fronds are very impressive: soft like silk and can reach 6 m in length.
It is native to New Zealand, Fiji and Polynesia.
Under good conditions this fern can be a rather fast grower depending on conditions: 20 cm in a year.
It likes the sun with some filtered light, sheltered from strong winds and it requires a sufficient amount of water.
This does not mean soaking wet, but very moist.
Of course the soil should be well drained.
This is a cold-hardy tree fern. -3°C.