The IOS has its 25th anniversary in 2017, and a superb way to celebrate it will be to get yourself to the Czech Republic in July where, during Oak Open Days based at his arboretum near Poděbrady, enthusiastic and dynamic IOS member Dušan Plaček is sponsoring a "Birthday Banquet" for participants at Poděbrady Castle.
Triennial Conferences
- 2015 – The Morton Arboretum, Illinois, USA (Chair, Andrew Hipp)
- 2012 - INRA and Université de Bordeaux I, Bordeaux, France (Chair, Thierry Lamant)
- 2009 - Benemérita Universidad Autónoma de Puebla, Puebla, Mexico (Chair, Maricela Rodriguez Acosta)
- 2006 – Texas A&M University, Texas, USA (Chair, David Richardson)
- 2003 – King Alfred College, Hampshire, England (Chair, Allen Coombes)
- 2000 – The North Carolina Arboretum, North Carolina, USA (Chair, Ron Lance)
- 1997 – The Huntington Botanical Garden, California, USA (Chair, Amy Larson)
- 1994 – The Morton Arboretum, Illinois, USA (Chair, Guy Sternberg)
