The Royal Caledonian Horticultural Society (now known as the Royal Caledonian Horticultural Society) was created in 1809, making it one of the oldest horticultural societies in the world. Its aim is to promote horticulture and gardening in Scotland.
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Royal Danish Horticultural Society's Garden was created in
1882.
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Ottawa Horticultural Society was created in 1892.
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American Horticultural Society was created in 1922.