The International Horticultural Congress (IHC) is the most important scientific event organised every four years since 1959 in the fields related to Horticulture under the auspices of ISHS (International Society for Horticultural Science).

ISHS is a truly global network comprising over 6,000 members. Its aim is to promote and foster research and education in horticultural science and to facilitate cooperation and knowledge transfer on a global scale through events and publications.

In a different continent every 4 years (...2010 Lisbon - 2014 Brisbane - 2018 Istanbul...), IHC regroups many divisions and commissions-symposia.