What is the minnesota landscape arboretum? The Minnesota Landscape Arboretum welcomes, informs and inspires all through outstanding plant displays, protected natural areas, horticultural research and innovative education. We strive to create a welcoming space to learn from and connect with nature.What is the arboretum in st louis known for? Open year-round, the Arboretum (or "Arb," as many visitors say) is best known for its beautiful display gardens, award-winning tree collections and natural areas. The Arb features miles of trails in all seasons, including paved paths, cross-country ski and snowshoe trails and Three-Mile Walk.Whats happening at the arboretum in september? The AppleHouse is 1.5 miles west of the Arboretum off Highway 5 and Rolling Acres Road. See the harvest moon, enjoy live music at Farm at the Arb, bite into fall flavors at the AppleHouse and more this month at the Arboretum. Find 2,000 gorgeous and colorful glass pumpkins in all shapes, sizes and colors on September 9-12.