
Known as the Mushroom Capital of the World, Kennett Square, PA, is home to numerous mushroom farms. The history of mushroom farming in Kennett Square dates back to the late 19th century when William Swayne, a successful florist, first grew mushrooms under his greenhouse benches. Today, the region produces a significant portion of the nation's mushroom crop, and the annual Mushroom Festival celebrates this legacy with vendors, exhibits, and culinary events. With a rich history, vibrant restaurant scene, and thriving agriculture industry, Kennett Square and its mushroom farms hold a unique place in Pennsylvania's heritage and economy.
| Characteristics | Values |
|---|---|
| Location | Kennett Square, PA |
| Population | 6,000 |
| Mushroom Production | 60% of all mushrooms grown in the US |
| Mushroom Production in 2023 | 400 million pounds |
| Annual Mushroom Festival Visitors | 100,000 |
| Number of Vendors at the Mushroom Festival | 250 |
| Number of Mushroom Farms in the State | 68 |
| Percentage of US Mushroom Crop Produced by These Farms | 68% |
| Job Support by the Mushroom Industry | 9,500 jobs |
| Annual Income Generated by the Mushroom Industry | $2.7 billion |
| Headquarters of South Mill Mushrooms | 649 West South Street, Kennett Square, PA 19348 |
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What You'll Learn

Kennett Square is the mushroom capital of the world
Kennett Square, Pennsylvania, has been dubbed the "Mushroom Capital of the World" due to its prolific mushroom production, accounting for over half of the total mushroom yield in the United States. This small borough in Chester County, with a population of just over 6,000 people, is a powerhouse in the mushroom industry, generating more than 60% of the country's mushroom supply.
The history of mushroom cultivation in Kennett Square dates back to the late 19th century, specifically around 1885. The story begins with William Swayne, a successful florist who had the ingenious idea to utilize the space under his greenhouse benches for growing mushrooms. He imported spawn from England and constructed the area's first mushroom house. Swayne's son, J. Bancroft Swayne, played a pivotal role in transforming mushroom growing into a commercial venture by establishing a spawn plant and a cannery. The success of the Swayne enterprise inspired others, and mushroom farming took root in the region.
The Italian immigrants hired by the Swaynes embraced mushroom cultivation, and their descendants continued the legacy, passing down the trade through generations. By the mid-20th century, Kennett Square witnessed a boom in mushroom farming, with hundreds of growing operations flourishing in the area. The favorable conditions and expertise in mushroom cultivation attracted companies like South Mill Mushrooms, which expanded through acquisitions and now operates state-of-the-art mushroom farms across North America.
Kennett Square's reputation as the Mushroom Capital of the World is further solidified by its annual Mushroom Festival. This highly anticipated event, held every September since 1986, attracts about 100,000 visitors and features approximately 250 vendors. The festival showcases mushroom-growing exhibits, culinary events, contests, and a variety of activities for all ages. It has gained recognition as one of the top food festivals and generously contributes all proceeds to local charities.
The impact of the mushroom industry extends beyond Kennett Square's borders, supporting 9,500 jobs and contributing approximately $2.7 billion to the local economy annually. The borough's agricultural prowess, particularly in mushroom cultivation, has made it a sought-after destination for homebuyers seeking a unique blend of quaint charm, fresh local produce, and easy access to big-city amenities.
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The history of mushroom farming in Kennett Square
Kennett Square, a borough in Chester County, Pennsylvania, is known as the "Mushroom Capital of the World". The history of mushroom farming in the region can be traced back to the late 1800s when William Swayne, a successful florist, decided to utilise the wasted space beneath the benches of his greenhouses by growing mushrooms. He imported spawn from England and built the first mushroom house in the area.
Swayne's son, J. Bancroft Swayne, returned from college and took over the mushroom business, transforming it into a commercial success. He developed a spawn plant and a cannery in addition to the growing houses. The success of the Swayne enterprise, coupled with the lucrative prices of mushrooms in city markets, inspired others to take up mushroom production as their primary occupation.
By 1900, the popularity of mushrooms had surged in Chester County, thanks to the construction of mushroom houses. These specially designed structures allowed growers to control temperature, humidity, and ventilation, making the region ideal for mushroom cultivation. The ability to grow mushrooms indoors, coupled with Kennett Square's proximity to major cities like Baltimore, Philadelphia, and New York, facilitated the expansion of the industry.
Over time, the development of the canned mushroom sector further propelled Kennett Square's reputation as the Mushroom Capital. Canning enabled mushrooms to be shipped internationally, expanding the market reach. Today, Kennett Square and its surrounding areas produce over 60% of all mushrooms grown in the United States, contributing significantly to the local economy and employment. The annual Mushroom Festival in Kennett Square celebrates this legacy, attracting over 100,000 visitors and raising funds for local nonprofit organisations.
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The Swayne family's role in the industry
Kennett Square, Pennsylvania, is known as the "'Mushroom Capital of the World', producing around 60% of all the mushrooms grown in the United States. The history of mushroom farming in the region can be traced back to 1885, when William Swayne, a successful florist, became the first person to grow mushrooms in Chester County.
Swayne was bothered by the wasted space under the benches in his greenhouses, so he decided to grow mushrooms there. He travelled to England to buy mushroom spores and built the first mushroom house in the area. His son, J. Bancroft Swayne, took over the mushroom business and made it a commercial success, developing a spawn plant and a cannery in addition to the growing houses. He hired Italians, mostly laid-off stonemasons, to work on the farm. This inspired many others to take up mushroom farming as their primary occupation, including the Italians he hired, who started their own farms and passed them down through their families.
Today, the Swayne family's legacy continues, with descendants of those first Italian farmers still growing mushrooms in the region. The industry supports 9,500–10,000 jobs and brings $500 million to $2.7 billion into the local economy annually.
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Annual Mushroom Festival
Kennett Square, Pennsylvania, is known as the "Mushroom Capital of the World", producing around 60% of all the mushrooms grown in the US. The borough's history with mushrooms dates back to the late 1800s when William Swayne, a florist, began growing mushrooms under the benches of his greenhouses. Today, the town celebrates its unique heritage with an annual Mushroom Festival.
The Kennett Square Mushroom Festival is a two-day event that takes place in September, attracting around 100,000 visitors. The festival features a wide range of mushroom-themed food, contests, and activities. Visitors can indulge in a variety of mushroom-inspired dishes, from savoury snacks like breaded mushrooms to hearty meals like creamy mushroom soup. The festival also includes a spicy mushroom-eating contest, an amateur fried mushroom-eating contest, and a Cute as a Button Photo Contest. There's also live music, a Kids Area with bounce houses and bungee jumps, and an Antique & Classic Car Show.
The festival offers something for everyone, with over 200 vendors selling mushroom- and non-mushroom-themed products, including crafts, prints, apparel, home decor, accessories, cookbooks, and other gifts. It's not just an opportunity to celebrate mushrooms, but also a way to support the local economy and raise money for nonprofit organizations.
The 2024 festival's theme is "Growing Strong", reflecting the resilience and success of the mushroom industry in Kennett Square. With its rich history, vibrant festival, and economic impact, the Annual Mushroom Festival is a testament to the borough's pride and dedication to its unique claim to fame.
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The economic impact of mushroom farming in the region
Kennett Square, Pennsylvania, has been known as the "Mushroom Capital of the World" due to its robust mushroom farming industry. The region's history of mushroom farming dates back to the late 19th century when William Swayne, a successful florist in Kennett Square, first grew mushrooms under his greenhouse benches. Over the years, mushroom farming in Kennett Square has grown significantly, and today, it produces a significant portion of the nation's mushroom crop.
The economic impact of mushroom farming in Kennett Square and the surrounding areas is substantial. According to the American Mushroom Institute, the region produces around 60% of all the mushrooms grown in the United States, with some sources placing this figure even higher at 65% to 68%. In 2023, farms in the region produced over 400 million pounds of mushrooms, contributing significantly to the local and state economy. The mushroom industry in Pennsylvania supports 9,500 jobs and infuses approximately $2.7 billion annually into the local economy.
The success of mushroom farming in Kennett Square can be attributed to several factors. Firstly, the industry benefits from a large and diverse workforce, including immigrants and multi-generational families. The region's Italian community, in particular, has played a significant role in the industry's development, with many Italian families passing down mushroom farms through generations. Additionally, the concentration of growing operations in Southern Chester County has created efficiencies and expertise in mushroom cultivation.
Mushroom farming in Kennett Square has also led to the development of related industries and businesses. Companies like South Mill Mushrooms have expanded their operations through acquisitions and the development of value-added mushroom products. The region also hosts the annual Mushroom Festival, a popular event that attracts about 100,000 visitors and raises funds for local nonprofit organizations. The festival celebrates the region's mushroom heritage with growing exhibits, culinary events, and other activities, further contributing to the economic impact of mushroom farming in the region.
Overall, mushroom farming in Kennett Square, Pennsylvania, has had a significant economic impact on the region. By producing a substantial portion of the nation's mushroom crop, the industry generates billions of dollars in revenue, supports thousands of jobs, and contributes to the growth of related businesses and events. The region's history, workforce diversity, and concentration of growing operations have solidified Kennett Square's reputation as the "Mushroom Capital of the World."
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Frequently asked questions
There are 68 mushroom farms in Kennett Square, PA.
Kennett Square is known as the Mushroom Capital of the World, with over half of all U.S. mushrooms coming from this area. The tradition of mushroom farming in Kennett Square dates back to the late 19th century when William Swayne, a successful florist in the area, grew mushrooms under his greenhouse benches. Inspired by his success, others began to follow suit, and the business took off.
In addition to the traditional white button mushrooms, farmers in Kennett Square also produce specialty mushrooms such as oyster and shiitake.
The annual Mushroom Festival, held every year since 1986, takes place on the first weekend after Labor Day and features mushroom growing exhibits, contests, culinary events, and children's activities.
























