Cibotium glaucum: Hawaiian Tree Fern (Hapuʻu pulu)

Cibotium glaucum, the Hawaiian Tree Fern or Blonde Tree Fern (Hapuʻu pulu in Hawaiian), is an iconic, large tree fern endemic to Hawaii. It develops a massive, woody trunk up to 20+ feet tall, covered in a dense, silky, golden-blonde to pale brown wool (pulu). The crown bears numerous large, arching, tripinnate fronds that are a distinctive glaucous blue-green underneath. It is a dominant species in Hawaiian wet forests.

Plant Profile

This tree fern requires a frost-free, humid, tropical or subtropical climate (USDA 10b+). It needs deep, well-drained, acidic soil, consistent moisture, and partial shade. The pulu (wool) was historically harvested for stuffing pillows, mattresses, and as a surgical dressing. It is a magnificent specimen for large, sheltered tropical gardens. In cooler climates, it can be grown in a conservatory.