The Ladd Arboretum and Evanston Ecology Center
- Educational and community gardening organization in Evanston. Overview of areas and specializations, meetings, membership, and volunteering.
- http://www.laddarboretum.org/

Cantigny Park
- A 500-acre public park and recreation area left by Colonel Robert R. McCormick. Garden areas include formal gardens, an idea garden, and a greenhouse that is occasionally opened to the public.
- http://www.cantignypark.com/

Washington Park Botanical Garden
- Part of the Springfield Parks District, this facility features greenhouses and a tropical conservatory, a large rose garden, a scent and texture garden, an iris garden, perennial border, a rockery, and an outdoor cactus garden.
- http://www.springfieldparks.org/garden/

Quad City Botanical Center
- Gardens located near the bank of the Mississippi River in Rock Island. Overview of admissions, facilities, and programs plus maps, directions, and calendar of events.
- http://www.qcgardens.com/

Luthy Botanical Garden
- Part of the Peoria Park District, features a tropical conservatory and specialty gardens including wildlife and woodland garden, collections of herbs, viburnums, and dwarf conifers, and a children’s garden.
- http://www.peoriaparks.org/luthy/luthymain.html

The Morton Arboretum
- Facility for research, education and enjoyment near Chicago aims to collect and study trees, shrubs, and other plants from around the world, and to display them across naturally beautiful landscapes. Information about activities, programs, and collections
- http://www.mortonarb.org/

Klehm Arboretum and Botanic Garden
- Former nursery in Rockford features a combination of plants native to the midwest and from around the world. Photo gallery, event calendar, visitor information.
- http://www.klehm.org/