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Cyathea cooperi (photo courtesy of Laura Dunkin-Hubby)
Cyathea cooperi (photo courtesy of Laura Dunkin-Hubby)

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Zone
Zones 15-25, 27, H1, H2
Full SunPartial Sun
Full, Partial
Regular Water
Moderate

Cyathea cooperi

Australian Tree Fern
Cyatheaceae
Ferns, Trees

Fastest growing of the fairly hardy tree ferns (to 20°F/–7°C, but with damage to fronds). Grows to an eventual 20 ft. tall and 12 ft. wide. Starts out as a low, wide clump (can spread from 1 ft. to as much as 6 ft. in a year) before growing upward. Broad, bright green, finely cut fronds. Brownish hairs on leafstalks and leaf undersurfaces can irritate skin; wear long sleeves and neck cloth when grooming plants. Reasonably certain to survive in sheltered places along the coast and in the warm coastal valleys of California. Becoming a pest in Hawaiian rain forests. Often sold as Alsophila australisAlsophila cooperi, or Sphaeropteris cooperi.

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