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The International Association of Horticultural Producers is an international organization dedicated to promoting horticultural producers and held the international garden / flora festivals or expositions.

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A garden club is an organized group of people with a shared interest in gardening, gardens, and plants. A flower club is a similar group with a focus on flowers.

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The Garden Society of Gothenburg is a park and horticultural garden in central Gothenburg, Sweden. It is located next to Kungsportsavenyen.

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Grow It Yourself Ireland in Ireland that aims to give its members the skills and confidence needed to grow vegetables and fruit successfully.

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HAS University of Applied Sciences is an independent university of applied sciences, specialising in food, agriculture, horticulture, nature and environment. It is located in 's-Hertogenbosch, the regional capital of North Brabant and Venlo, Limburg. All bachelor programmes are accredited by the Dutch Flemish Accreditation Organisation. In 2017 there were around 3400 students enrolled at HAS University of Applied Sciences.

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Hortus Bulborum is a Dutch foundation that conserves historic cultivars of spring flowering bulb- and tuber crops. The collection garden of the foundation is located at the Zuidkerkenlaan in Limmen, North Holland, Netherlands, near the historic city of Alkmaar.

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The International Bulb Society was founded on May 31, 1933 and is an international society dedicated to informing the public about the science, cultivation, conservation and botany of geophytic plants, commonly known as bulbs.

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The National Horticultural Society of France is a horticultural society founded in 1827 by Louis-Étienne Héricart de Thury. Headquartered in Paris, it comprises specialized departments which organize conferences, themed journeys and garden visits, and exhibitions.

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Plant & Food Research is a New Zealand Crown Research Institute (CRI). Its purpose is to enhance the value and productivity of New Zealand's horticultural, arable, seafood and food & beverage industries. The interests of the institute are based in horticulture, arable and seafood research, specifically in the areas of sustainable production, bioprotection, elite genetics & intelligent breeding, food and health science and biomaterials.

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The Pacific Bulb Society (PBS) is a nonprofit organization, founded in 2002, dedicated to informing and helping people who grow or are interested in flowering bulbs and other geophytes. Despite the name "Pacific", the society covers geophytes from around the world, and is open to people from any country. Members range from casual gardeners to professional botanists employed by major botanical gardens.