Dicksonia antarctica (Antarctic Tree Fern)One if not the most cold hardy tree ferns known. Plants are native to Australia and Tasmania and plants often can recover from frost or slight freeze. Hardy to around 20F plants are often covered in cooler climates to survive harsh winters. Dicksonia antarctica does best in cool climates with regular watering in shaded damp areas. If in full sun or dry climate extra watering maybe needed to keep plants healthy.