W. L. Carlyle (left) and R. S. Mackintosh (right) eating watermelon that was awarded first premium prize, probably at the Minnesota State Fair, 1895. Mackintosh was the society's president from 1918–1919 and secretary-treasurer from 1920–1943.
The year 2016 marked the 150th anniversary of the Minnesota State Horticultural Society. In its early years, the society was a small, male-dominated organization focused on fruit production. Its mission shifted to become more educational as members taught each other, and the public, how to use plants to enhance their environments.