Hi- Maybe somebody that lives in Oak Park can answer this better, but Oak Park is supposed to have one of the best farmer's markets in the Chicago area I have never been there, because the one in Evanston is also one of the best, and I live three blocks from that one. I bet you that somebody at Oak Park sells thai basil. I know Nichols sells there, and they might carry it. There are several people that sell at Evanston that I know carry it, but Henry Brockman does not sell at any other markets, and I am not sure if Green Acres sells at Oak Park. It probably won't be available for another month. You can probably get a plant there though this Saturday. Basil is not that hard to grow. I grow a lot of it on my condo balcony. Hope this helps, Nancy