The Minnesota Landscape Arboretum is a 1,200-acre horticultural garden and arboretum located about 4 miles west of Chanhassen, Minnesota at 3675 Arboretum Drive, Chaska, Minnesota. It is part of the Department of Horticultural Science in the College of Food, Agricultural and Natural Resource Sciences at the University of Minnesota, and open to the p…The Minnesota Landscape Arboretum is a 1,200-acre horticultural garden and arboretum located about 4 miles west of Chanhassen, Minnesota at 3675 Arboretum Drive, Chaska, Minnesota. It is part of the Department of Horticultural Science in the College of Food, Agricultural and Natural Resource Sciences at the University of Minnesota, and open to the public every day of the year except Thanksgiving and Christmas. An admission fee is charged, and annual memberships are available. It is the Upper Midwest's largest public garden.