osmundine
/ˈɑzmənˌdin/
noun
- A fibrous material made from the roots of certain ferns, used as a growing medium for orchids and other epiphytic plants.
- Gardeners often use osmundine to provide good drainage for tropical plants.
- The orchid was potted in a mixture of osmundine and bark chips.
- She added fresh osmundine to the hanging basket to help the fern thrive.