The farmers are friendly and have high-quality produce and some offer organic (no pesticides). There are also baked goods, candies, chocolates, and potted plants/cut flowers. Each farmer has a temporary license from the Health Department which adds to the secure feeling you get from purchasing at a market like this one.
The Grove City Area Chamber of Commerce is the driving force behind the Grove City Farmers' Market so if you have questions, contact them.
Grove City also have a Harvest Market in the fall, but I believe it is run by a separate organization...same farmers for the most part.