- Hardy Fern Foundation
 - Established to provide a comprehensive collection of the world's hardy ferns for display, evaluation, public education, and introduction to the horticultural community. - British Pteridological Society
- Provides information about ferns through its publications and other literature. Also organises formal talks, informal discussions, field meetings, garden visits, plant exchanges, a spore exchange scheme, and fern book sales.
- Los Angeles International Fern Society
- American Fern Society
- Group of people interested in studying, growing, and preserving fern and fern-allies.
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