Alsophila australis, commonly known as the Rough Tree Fern, is a semi-deciduous fern native to the moist, shaded understory of temperate rainforests and wet sclerophyll forests in southeastern Queensland, New South Wales, southern Victoria, Tasmania, and Norfolk Island in Australia. It thrives in altitudes up to 4199 feet. This species can reach up to 39 feet in height, with a thick, fibrous trunk and large, arching fronds that can extend up to 13 feet long, giving it a distinctive and prehistoric appearance. The Rough Tree Fern is notable for its lush greenery and its ability to create a tropical ambiance in gardens.

In cultivation, Alsophila australis is valued for its dramatic foliage and as a focal point in shaded garden areas. It is often used in moist, sheltered spots, and can be grown as an indoor plant in large spaces. The Rough Tree Fern prefers consistently moist soil, high humidity, and protection from strong winds. It requires shade to part shade and should be watered regularly to maintain its health. While it is relatively low-maintenance, it can be susceptible to scale insects and mealybugs. Due to its potential invasiveness, it is crucial to consult local guidelines before planting it outside its native range.CC BY-SA 4.0