- American Hosta Growers Association (AHGA)
 - Trade organisation for nurseries that specialise in the growing and sale of hostas. Features a membership forum and hosta of the year. - American Hosta Society (AHS)
- Society founded in 1968 to study and improve the hosta genus and to disseminate general and scientific knowledge about the perennial.
- Southeast Wisconsin Hosta Society
- Educational society whose purpose is to promote knowledge and love of hostas, encourage development of new and improved cultivors, and promote wider use and appreciation of the plant.
- Upstate New York Hosta Society
- Formed to foster and promote knowledge of, and interest in, the genus, Hosta.
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