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Cyathea australis (Rough Tree Fern)

Cyathea australis, commonly known as the Rough Tree Fern, produces a tall and slender, brown trunk and can grow up to 15 m tall with a spread of 6 m. The dark green fronds are soft and delicate, and held horizontally as they radiate from the top of the trunk. Cyathea australis is great for providing a sub-tropical feel to a garden. It is also used for revegetation projects, added to native gardens, used in woodland gardens, planted alongside streams, or included in a mixed planting to provide height and texture.

Cyathea australis tree fern.

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Suited to regions:Subtropical, Temperate
Plant type:Ferns
Height:15.00 m
Spread:8.00 m
Flowering time:
Tolerances:Shade
Garden uses:Ponds, Pool areas, Screening
Garden styles:Architectural, Modern, Riparian, Tropical
Easy to grow?Yes
Maintenance requirementsLow
Growth rateMedium
Also known as
Sku15970

How to grow Cyathea australis (Rough Tree Fern) in NZ

Growing Cyathea australis (Rough Tree Fern) in New Zealand is straightforward when planted in moist, well drained soils rich in organic matter. It thrives in shaded to semi shaded locations and appreciates regular watering, particularly in summer. Mulching around the base helps conserve soil moisture and promotes strong growth. This fern is well suited to sheltered gullies, shaded gardens, and forest style plantings.

Cyathea australis (Rough Tree Fern) care tips

Caring for Cyathea australis (Rough Tree Fern) involves maintaining consistent soil moisture and shelter from strong winds. A liquid fertiliser applied in spring and summer will support lush frond production. Old fronds can be removed as they die back to keep the plant looking neat. This species is hardy and thrives with minimal care once established.

Cyathea australis (Rough Tree Fern) size, spacing, and growth rate

Cyathea australis (Rough Tree Fern) typically grows 9 to 12 metres tall with fronds reaching 4 to 5 metres long. Allow 3 to 4 metres spacing between plants to showcase their form. The growth rate is moderate, with trunk height increasing steadily over time, making it a long lived and impressive specimen.

Landscaping uses for Cyathea australis (Rough Tree Fern)

Cyathea australis (Rough Tree Fern) is perfect for shaded gardens, riparian planting, and forest landscapes. Its tall trunk and expansive fronds create an immediate sense of scale and lushness. It works beautifully as a specimen plant or grouped with other ferns to create dramatic displays. The Rough Tree Fern also contributes to ecological planting by providing shelter and habitat.

Why buy Cyathea australis (Rough Tree Fern) from The Plant Company?

Purchasing Cyathea australis (Rough Tree Fern) from The Plant Company ensures you receive robust, healthy ferns grown in New Zealand conditions. As NZ’s most trusted plant nursery, we supply premium quality plants that establish quickly and thrive. Customers value our expert advice, careful packaging, and fast nationwide delivery. When you buy from The Plant Company, you can be confident your Cyathea australis (Rough Tree Fern) will bring lasting beauty and grandeur to your garden or project.

Questions and Answers

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