Founded in 1998 by the Quach Family, Champ’s Mushrooms began with little more than a packing room, a few trucks, and a handful of experienced, quality-conscious mushroom growers. Although small in size, our commitment to providing our customers with a steady, year-round supply of farm fresh, local mushrooms was anything but.

In 2017, South Mill and Champ's Mushrooms merged to become South Mill Champs. Their mushroom farming story begins almost 90 years ago, in 1932, when Louie Pia began operating a small mushroom farm in southeastern Chester County, Pennsylvania. In the 1950s, the Pia family began supplying mushroom growing substrate to many local, family-owned mushroom farms and in a few short years, grew to become the area’s largest fresh mushroom supplier. In 1982 the family purchased one of Pennsylvania’s largest mushroom farms and soon were selling fresh mushrooms directly to the retail, wholesale, food service, and commercial markets under the “South Mill” name.