Illinois Orchid Society Show and Sale,
October 11 and 12, 10am to 5pm, at the Chicago Botanic Garden.
Free admission to show and parking lot for IOS and CBG but non-members pay $15 to park.
Exhibits, plants, supplies, repotting service
"The emphasis at the IOS fall mini-show is not on orchid society exhibits or commercial vendor exhibits, but rather on exhibits mounted by individual society members or small teams of two or three society members...."

IOS Fall Mini Show and Orchid Sale