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| Category: Fern |
| Family: Cyatheaceae (Cyatheaes) |
| Origin: Australia (Australasia) |
| Evergreen: Yes |
| Flower Color: NA |
| Bloomtime: Not Significant |
| Synonyms: [Alsophila australis, Sphaeropteris cooperi] |
| Height: 15-20 feet |
| Width: 8-12 feet |
| Exposure: Sun or Shade |
| Irrigation (H2O Info): Medium Water Needs |
| Winter Hardiness: 20-25° F |
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Cyathea cooperi (Australian Tree Fern) - This is a fast growing tree fern that grows to 20 feet and spreads up to about 8 to 12 feet. The finely divided fronds rise out of the trunk and arch down as they get older. Fuzzy brown and white scales cover the trunk and leaf stems. Plant in bright light (even tolerates full sun in coastal areas) in a well-drained soil and provide regular irrigation. Irrigation can be applied to the trunk as well as the surrounding soil but avoid watering the crown as this enhances conditions that promote diseases such as Rhizoctonia or Tip Blight (Phyllosticta). Tip blight has become a more prevalent disease of tree ferns in southern California and seriously disfigures the new growth and older foliage. Given optimum conditions this plant can grow several feet per year and reach 20 feet tall. It is hardy to about 20 degrees F.
The information about Cyathea cooperi that is displayed on this web page is based on research conducted in our nursery's horticultural library and from reliable online resources. We will also include observations made about this plant as it grows in our nursery gardens and other gardens that we have visited, as well how the crops have performed in containers in our nursery field. We also incorporate comments that we receive from others and welcome hearing from anyone with additional information, particularly if they share cultural information that aids others growing this plant.
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