Dicksonia Dicksonias belong to the tree fern family and are actually live fossils. They originated in the Mesozoic era, when dinosaurs were prevailing animals on Earth. In nature, Dicksonias appear in Central and South America, from the Pacific to New Guinea. Most of the species are now endangered, while the most widely known is D. antarctica. For successful growth, these plants need a well lit and humid spot with the temperature between 0° C and 30° C. They do not endure frost very well. High air humidity is extremely beneficial for those plants, in any other case the young offshoots might stop developing and the plant subsequently dies.