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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 on this page is based on the research that we have conducted about this plant in the San Marcos Growers library, from what we have found on reliable online sources, as well as from observations made of our crops of this plant growing in the nursery and of plants growing in the nursery's garden and those in other gardens where we may have observed it. We also have incorporated comments received from others and welcome getting feedback from those who may have additional information, particularly if this information includes cultural information that would aid others in growing Cyathea cooperi. |
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