The International Association of Horticultural Producers (French: Association Internationale des Producteurs de l'Horticulture; AIPH) is an international trade association dedicated to supporting horticultural producers and promoting the industry globally. It is the primary body responsible for approving and overseeing international horticultural exhibitions.

History The AIPH was founded in 1948 in Zurich, Switzerland. It was established by representatives from Western European grower associations who sought to mend international relations and rebuild the horticultural community following the devastation of the World War II. Since its inception, the organization has evolved from a regional initiative into a prominent international body.

Mission The association’s core mission is to reignite and uphold a global appreciation for plants, which it defines as a fundamental human instinct. AIPH operates under the belief that modern urbanization and technology have detached humanity from the natural world, leading to unnatural lives. To counteract this, the organization strives to achieve a "healthy and stable equilibrium" between: Humanity, Technology, Nature.

Horticultural exposition AIPH holds the international mandate for approving and regulating major horticultural exhibitions, a responsibility governed by an international convention to ensure the highest global standards. Since 1960, in partnership with the Bureau International des Expositions (BIE), AIPH has overseen and supported over 50 World Horticultural Expos. These events serve as world-class spectacles that attract millions of visitors, providing a global platform to showcase horticultural products to the public, businesses, and governments. Beyond their scale as major attractions, a primary objective of these sanctioned expos is to create green legacies, ensuring that host cities benefit from permanent urban parklands and environmental improvements that sustain the community long after the events have concluded.

Categories AIPH recognises four different categories of horticultural exposition, with the following table summarising the main differences between each of them. Categories Official name Duration ApplicationA1International Horticultural Expos50BInternational Green Expos3 – 6 months2510 – 3 years beforeCInternational Horticultural Shows4 – 20 days0.65 – 0.5 years beforeDNo requirement5 – 0.5 years before

International Horticultural Expos The following is a list of International Horticultural Expos classified as Category A1 by the AIPH.

YearLocationDatesVisitorsParticipantsTheme1960 Rotterdam, Netherlands25 March – 25 September 1960504,000,000N/AInternational Horticulture1963 Hamburg, West Germany26 April – 13 October 1963765,400,00035Horticulture of all Categories from the Point of View of Economics and Culture1964 Vienna, Austria16 April – 11 October 19641002,100,00028International Horticulture1969 Paris, France23 April – 5 October 1969282,400,00017Flowers of France and Flowers of the World1972 Amsterdam, Netherlands26 March – 1 October 1972754,300,000N/AEfforts accomplished by International Horticulture1973 Hamburg, West Germany27 April – 7 October 1973765,800,00050International Horticulture1974 Vienna, Austria18 April – 14 October 19741002,600,00030International Horticulture1980 Montreal, Canada17 May – 1 September 198040N/A231982 Amsterdam, Netherlands8 April – 10 October 1982504,600,00017International Horticulture1983 Munich, West Germany28 April – 9 October 19837211,600,00023International Horticulture1984 Liverpool, United Kingdom2 May – 14 October 1984953,380,00029The progress accomplished by International and National Horticulture1990 Osaka, Japan1 April – 30 September 199014023,126,93483The Harmonious Coexistence of Nature and Mankind1992 Zoetermeer, Netherlands10 April – 12 October 1992683,355,60023Horticulture is being involved in a continuous process of renewal1993 Stuttgart, Germany23 April – 17 October 1993647,311,00040City and Nature – Responsible Approach1999 Kunming, China1 May – 31 October 19992189,427,00070Man and Nature – Marching into the 21st century200225 April – 20 October 20021402,071,00030The contribution of the Netherlands horticulture and international horticulture2003 Rostock, Germany25 April – 12 October 20031002,600,00032A Seaside Park. A new flowered world2006 Chiang Mai, Thailand1 November 2006 – 31 January 2007803,848,79132To Express the Love for Humanity2012 Venlo, Netherlands5 April – 7 October 2012662,046,68438Be part of the theatre in nature; get closer to the quality of life2016 Antalya, Turkey23 April – 30 October 20161124,693,57154Flowers and Children2019 Beijing, China29 April – 7 October 20195039,340,000110Live Green, Live Better202214 April – 9 October 202260685,18932Growing Green Cities2023 Doha, Qatar2 October 2023 – 28 March 202480N/AN/AGreen Desert, Better Environment2027 Yokohama, Japan19 March – 26 September 202780Scenery of the Future for Happiness2029 Nakhon Ratchasima, Thailand109Nature and Greenery: Envisioning the Green Future2031 Minnesota, United States1 May – 15 October 203190.6Human/Nature: Where Humanity and Horticulture Meet

International Green Expos The following is a list of International Green Expos classified as Category B by the AIPH.

YearLocationDatesVisitorsTheme2004 Hamamatsu, Japan8 April – 11 October 2004565,440,000N/AFlowers, Greenery, Water: Creating New Style of Living2006 Shenyang, China1 May – 31 October 20062463,500,00025Man and nature, we live harmoniously2010 Taipei, Taiwan6 November 2010 – 25 April 201191.88,900,00030River, Flower, New Horizon2011 Xi'an, China28 April – 22 October 201141828Nature and People in One in Chang’an, Nature Creativity2011 Chiang Mai, Thailand802,200,000312013 Suncheon, South Korea20 April – 20 October 2013111.22,000,00023Garden of the Earth2014 Qingdao, China25 April – 25 October 201424112,600,00037From the Earth, for the Earth2016 Tangshan, China29 April – 16 October 20165405,200,00015City and Nature, Phoenix Nirvana2018 Taichung, Taiwan3 November 2018 – 24 April 201960.887,240,00026Rediscover A Green, Nature and People2021 Yangzhou, China8 April – 8 October 20212301,600,00015 Green City, Healthy Life2021 Hatay, Turkey1 April – 20 June 2020321,083,56810Garden of Civilisations2023 Suncheon, South Korea1 April – 31 October 20231939,812,15730We Live In The Garden202323 April – 30 October 2023782,000,00022Nature Friendly City and Sensitivity2024 Chengdu, China26 April – 28 October 202424210,230,00023Park City, Beautiful Habitat2026 Udon Thani, Thailand1 November 2026 – 14 March 2027165 Diversity of Life: Connecting People, Water, and Plants for Sustainable Living2028 Ulsan, South Korea22 April – 28 October 2028124 Garden, the Cradle of the Earth2029 Baghdad, Iraq1 October 2029 – 1 April 2030375 Green Light in Desert

Member organisations AIPH is currently composed of representative grower organizations from 33 member states across the globe, prioritizing the professional interests of horticultural producers through a non-governmental framework that fosters international cooperation, technical exchange, and the official sanctioning of horticultural exhibitions.

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