A reader asked when Farmer's Markets wind down for this season. Here are a few of the more popular ones. The full list has more complete information. Most run through the last Saturday in October including:
Downtown City Market
38th/Illinois: listed as running through early October
Zionsville and Carmel run through mid-October.
Update: Erin reports Carmel runs through the end of September.
I'll see if I can't put together a list of Winter markets in the next few weeks.