This educational fair features more than 20 plant societies and garden clubs. Plant experts from participating groups will offer advice and answer questions in the Oswald Visitor Center’s MacMillan Auditorium at Minnesota Landscape Arboretum on Highway 5 in Chanhassen. In addition, special and unusual plants will be available for purchase, along with a variety of books and educational material. Free lectures will cover everything from tree maintenance to growing dahlias. Free with normal gate admission. For more information, call (952) 443-1400 or visit www.arboretum.umn.edu.