The Idea Garden, part of the University of Illinois Arboretum in Urbana, is 15,000 square feet of planted space. Champaign County Master Gardener volunteers work more than 2,500 hours each year in the garden to provide a source of inspiration, relaxation, and continuing education for our community and its visitors. Since 1997, the Idea Garden has been maintained as an educational tool to demonstrate garden design and maintenance ideas, to encourage novice and experienced gardeners to experiment with new plants and techniques, and as a site for public workshops.