1932 – THE BEGINNING

South Mill’s roots began 4 generations ago in 1932 when John Pia, an Italian immigrant, began operating a small mushroom farm in southeastern Chester County, Pennsylvania.

1950 – PRODUCING SUBSTRATE

The focus of the business changes from mushroom growing to the production and sale of mushroom growing substrate to local mushroom growers

1982 – THE NEXT BIG STEP

The Pia family, through its marketing division of South Mill Mushroom Sales, purchased their Kennett Square, Pennsylvania mushroom-growing operation from the Clorox Corporation. Clorox operated the facility under the “Grocery Store Products” label, selling...

1984 – Vacuum Cooling

Vacuum cooling, a technology only recently available at the time, is implemented via the purchase of a 15,000 pounds capacity vacuum cooler, providing the ability to properly cool mushrooms in just 20 minutes versus the 24 hours it previously took in typical cold...

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