Fall Bulb Festival at Chicago Botanic Garden is October 4-6 from 10am to 4pm (the 4th is for members only). Features 250+ varieties of daffodils, tulips, crocus, and specialty bulbs.
There are 15 vendors, live music, wine, beer and cider, jams, herbs, vegetables plus you can buy bulbs.
Admission is free BUT parking is $25 per car.