ponga
Alsophila dealbata, Cyathea dealbata | silver tree fern, ponga
One of New Zealand's most recognisable native plants, the Silver Fern is distinguished by its graceful, arching fronds with striking silver-white undersides that become more pronounced as they mature. These reflective fronds, combined with its patterned trunk marked by old frond bases, create an elegant, architectural form. Slower growing than mamaku, it develops a denser, more refined crown and thrives in sheltered, moist sites with partial shade, although it can tolerate full sun in drier soils if protected from strong winds. Widely used in gardens, revegetation projects, streamside plantings, and native forest understoreys, the Silver Fern is valued for its subtropical character, ornamental beauty, and enduring cultural significance as an iconic symbol of New Zealand.
typical habitat.
coastal forest
lowland forest
montane forest
shrubland
drainage.
moist
sun.
full shade
partial shade
mature specifications.
height | 6m
width | 4m
did you know?
In te ao Māori, ponga is a symbol of new life and growth. Its trunks were traditionally used in the construction of whare, walls, and palisades. The koru motif, inspired by the unfurling silver fern frond, is widely used in art, carving, and tā moko.
Mature ponga fronds reveal their distinctive silver undersides, which, when illuminated by moonlight, create a luminous trail, historically guiding travelers through the darkness.