Article 4 of the 1928 Paris Convention states that the Bureau International des Expositions (BIE) may grant recognition to:

“A1 horticultural exhibitions approved by the International Association of Horticultural Producers, provided that there is an interval of at least two years between such exhibitions in different countries and at least ten years between events held in the same country”

Since 1960, the Bureau International des Expositions (BIE) has recognised 23 Horticultural Expos.

Horticultural Expos foster cooperation and the sharing of knowledge and solutions between countries, horticultural producers and agricultural industries by addressing the paramount issues of healthy lifestyles, green economies, sustainable living, education and innovation.

Horticultural Expos are organised by a host country, and last up to 6 months. Participants include Countries and International Organisations (Official Participants) as well as Cities, Regions, Companies, Civil Society and NGOs (Non-Official participants).

The most recent Horticultural Expo was held in Doha, Qatar, and took place under the theme “Green Desert, Better Environment” between 2 October 2023 and 28 March 2024.

The next Horticultural Expo is being held in Yokohama, Japan. It will welcome visitors under the theme “Scenery of the Future for Happiness” between 19 March and 26 September 2027.

View the list of all Horticultural Expos since 1960

Official Designation International Horticultural Exhibition
Organiser Host country
Duration Up to six months
Frequency Between two World Expos, with a gap of at least two years between each Horticultural Expo*
Size No maximum size
Official Participants Countries and International Organisations
Non-Official Participants Cities, Regions, Companies, Civil society and NGOs

* The interval may be exceptionally reduced if approved by the BIE