Botanical name:

Nephrolepis brownii

Common name(s):

Rough sword fern

About:

This native species has a distribution that is confined solely to the Kermadec Islands and the unique thermal areas of the North Island's Central Plateau. It features a spreading rhizome but notably lacks the small translucent tubers typically associated with N. cordifolia. The ladder-like fronds of this plant are shorter in stature, typically growing to a height of 30-80 cm. This native species is available for purchase from some specialised nurseries. It prefers to be situated in a warm, sheltered area and thrives best in light, rich soil. While it can tolerate direct sunlight, it generally looks more vibrant and appealing when grown in light shade.

Natural habitat:

Common throughout the dry and wet forest habitats of Raoul Island and in open shrub-land, around thermal vents and the craters of Raoul. Sometimes found as a low epiphyte. On Macauley Island it is much less common but has been collected growing under Kermadec ngaio (M. kermadecense).

Growing environment:

Sun, Shade & Wind tolerant

Endemic distribution:

New Zealand’s North & Kermadec Islands (Dayrell, Raoul, Macauley and Curtis islands). Common throughout the Pacific and Australia, and extending into Malesia and India. Probably more widespread than this but the exact application of the name outside our region is unclear.

Height: 80cm

Flowering: N/A Spore producing.

Fruiting: N/A

Uses:

Riparian plantings, Forests & Container friendly

How to grow:

Easily grown from rooted pieces and fresh spores. Cold sensitive. In ideal conditions a very fast growing fern that can become invasive. An excellent pot plant. Best grown in partial shade, in a rich, moist but free draining soil.