Cyathea medullaris (Black Tree Fern, Mamaku)

How to grow Cyathea medullaris (Black Tree Fern, Mamaku) in NZ

Growing Cyathea medullaris (Black Tree Fern, Mamaku) in New Zealand is rewarding when planted in moist, sheltered locations. It thrives in partial to full shade and prefers humus rich, free draining soils. Regular watering, especially in summer, is important to keep the fronds lush. Incorporating organic matter around the base supports healthy growth and long term vigour.

Cyathea medullaris (Black Tree Fern, Mamaku) care tips

Caring for Cyathea medullaris (Black Tree Fern, Mamaku) is simple with the right environment. Keep the soil consistently moist and mulch heavily to retain water. Protect young plants from frost and strong winds. A liquid fertiliser applied in spring and summer will promote lush frond development. Remove older fronds as they die back to maintain tidiness.

Cyathea medullaris (Black Tree Fern, Mamaku) size, spacing, and growth rate

Cyathea medullaris (Black Tree Fern, Mamaku) is New Zealand’s tallest tree fern, growing 10 to 20 metres high with fronds reaching 5 metres long. Allow at least 3 to 4 metres spacing for each plant to showcase its full form. It has a moderate growth rate, often adding 10 to 20 cm of trunk height each year when well cared for.

Landscaping uses for Cyathea medullaris (Black Tree Fern, Mamaku)

Cyathea medullaris (Black Tree Fern, Mamaku) is highly valued in landscaping for its scale and beauty. It is ideal for native gardens, riparian planting, and shaded woodland areas. Its towering trunk and expansive fronds provide an immediate sense of drama and lushness. It is also culturally significant and a feature plant that instantly enhances New Zealand themed landscapes.

Why buy Cyathea medullaris (Black Tree Fern, Mamaku) from The Plant Company?

Purchasing Cyathea medullaris (Black Tree Fern, Mamaku) from The Plant Company ensures you receive premium quality ferns grown in New Zealand conditions. As NZ’s most trusted plant nursery, we supply healthy, well established plants that thrive in gardens and landscapes. Customers value our expert guidance, careful packaging, and fast nationwide delivery. When you buy from The Plant Company, you can be confident your Cyathea medullaris (Black Tree Fern, Mamaku) will provide long lasting beauty and distinction in your project.