Kennett Square Celebrates Heritage as ‘Mushroom Capital of the World’
From portobello to shiitake, if you fancy an edible fungus, you don’t have to travel far beyond Philadelphia to experience the allure of mushrooms in Kennett Square.
Known as the “mushroom capital of the world,” Kennett Square celebrates its agricultural heritage each year with the annual Kennett Square Mushroom Festival, which will take place on Sept. 6-7. Rides, music, live entertainment, and plenty of mushrooms for sampling are all part of the festivities along State Street in the town.
How did Kennett Square become associated with mushrooms? During the latter half of the 19th century, a Quaker florist in Kennett Square took mushroom spawn — a colony of mycelium, which produce mushrooms — from England and placed it underneath a bench in his greenhouse. Other flower growers in the area started doing the same, creating the first mushroom production site in the United States.
When European immigrants arrived in the area during the 1920s, they were already familiar with mushroom cultivation and soon transformed a hobbyist pursuit into a significant agricultural commodity. In 1955, the American Mushroom Institute began, setting down roots in Kennett Square.
Today, the mushroom industry in southeastern Pennsylvania is a significant economic driver, employing more than 8,000 people and encompassing over 2,000 mushroom-growing facilities in Chester County.
The most common mushroom species grown almost exclusively in Kennett Square is the white button mushroom, Agaricus bisporus. This species is also known more commonly as a cremini or baby bella. When the white button matures to full size, it becomes known as a portobello.
According to U.S. Department of Agriculture statistics, during the 2023-2024 Pennsylvania mushroom cultivation season, farmers grew approximately 643 million pounds of Agaricus bisporus, valued at about $1 billion. In that same year, Pennsylvania was responsible for 69% of total Agaricus bisporus sales nationwide.
Learn more about the mushroom industry in Kennett Square on the Kennett Mushrooms website.