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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.
This information about Cyathea cooperi displayed is based on research conducted in our horticultural library and from reliable online resources. We also will relate observations made about it as it grows in our nursery gardens and other gardens we have visited, as well how the crops have performed in containers in our nursery field. We will also incorporate comments that we receive from others and we welcome hearing from anyone with additional information, particularly if they can share any cultural information that would aid others in growing it.
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