The Australian tree fern ( Cyathea cooperi) is a large tropical fern that forms a trunk. In the wild, a mature tree's medium to dark green fronds can grow 5 to 8 feet long, but the fronds will be ...

The best choice for our landscapes is Australian tree fern (Sphaeropteris cooperi), a potentially 20-foot-tall species that’s been described as elegant and lovely.

First of all, tree ferns are ferns, but they are not really trees. To be a tree, a plant must be woody (undergo secondary plant growth, which thickens stems and roots) and grow to a height of at least ...