These evergreen ferns are superb for creating tropical effects. A solitary brown trunkthe upper portion of which is thickly covered with silky hairssupports arching, intricately divided, feathery-looking fronds. Provide reasonably fertile, well-drained soil and shelter from strong winds. Prune to remove old or injured fronds. The two Hawaiian natives listed here are hardy to 30F; beyond their hardiness range, they can be grown in a large greenhouse or sunroom in bright light.
C. chamissoi. To 6 ft., possibly 20 ft. tall, with crown spreading about 10 ft. wide. Yellow-green fronds.
C. glaucum. Very slow growth to 20 ft. tall, with crown to 15 ft. wide. Leathery, gray-green to bluish fronds with waxy undersides.