Plants
- 521
- The European Palm Society
- An organization dedicated to the sharing of information about palms and other exotic plants across the continent of Europe.
- 522
- The Milwaukee Rose Society
- Meeting information, calendar of events, rose show results, and rose photos.
- 523
- Seattle Rose Society
- Society information, rose care articles, events and activities, and a members-only section.
- 524
- The Olympia Rose Society
- The Olympia Rose Society is dedicated to the promotion and education of the Rose. Affiliated with the Pacific Northwest District of The American Rose Society.
- 529
- San Antonio Rose Society
- Features meeting schedules, articles, event calendars, and resource links.
- 530
- Texas Rose Rustlers
- Organization of rose enthusiasts who take delight in propagating roses found outside their gardens. Provides techniques and advice on starting roses from cuttings, methods, collecting and rooting.
- 532
- Tri-State Rose Society of Chattanooga
- Meeting schedules, event calendars, care tips, and recommended varieties.
- 533
- Rhode Island Rose Society
- Maintains the historic Victorian Rose Garden at Roger Williams Park in Providence, RI. Hundreds of rose photos and much rose information.
- 534
- Pittsburgh Rose Society
- Offers event schedules, a list of officers and consulting rosarians, and recommendations on varieties that do well in the area.
- 535
- The DelChester Rose Society
- Features meeting schedules, show results, event calendars, articles, and applications. Serves Delaware and Chester counties.
- 536
- The Tulsa Rose Society
- Holds business meetings at the Delta Cafe, with presentations at the Tulsa Garden Center. Links to society information and activities.