Plaque on the Niagara River Recreation Trail at the Niagara Parks School of Horticulture Botanical Gardens. “Niagara Parks School of Horticulture. Established in 1936 of 40 hectares (100 acres) of land, the Niagara Parks School of Horticulture is the only known school of its kind in North America. Its graduate gardeners obtain positions in parks and in floriculture, horticulture, nursery and greenhouse enterprises in Canada and the United States”.