International Bulb Society
- Devoted to the dissemination of information on the growing, conservation and botany of all geophytic plants (bulbs).
- http://216.247.182.213/

Pacific Bulb Society
- Organization for people who garden with bulbs that can be grown outdoors in any of the climates of the Pacific Rim. Seed exchange list, and wiki with information and a wealth of plant photos.
- http://www.pacificbulbsociety.org/

Indigenous Bulb Association of South Africa
- Interest group that specializes in South African bulbs, engaging in seed exchange, publications, and conservation efforts. Site includes newsletter articles and conservation information.
- http://www.safricanbulbs.org.za/

French Iris and Bulbous Plant Society
- Society for the discovery and enjoyment of iris, other irides and bulbous plants of botanical and horticultural interest. French site, with several pages in English.
- http://www.iris-bulbeuses.org/