
Kennett Square, a borough in Chester County, Pennsylvania, is known as the Mushroom Capital of the World. The region, which includes Kennett Township, produces more than 500 million pounds of mushrooms annually, accounting for more than half of the total mushroom crop in the United States. The mushroom industry in Kennett Square has a long history, dating back to the late 1800s when William Swayne, a local florist, first began growing mushrooms under his greenhouse benches. Today, the industry is a major contributor to the local economy, generating nearly $4 billion in annual revenue and providing employment for thousands of people, many from the area's large Hispanic community.
| Characteristics | Values |
|---|---|
| Location | Kennett Square, Chester County, Pennsylvania |
| Mushroom Production | 400-500 million pounds of mushrooms per year |
| Percentage of US Mushroom Production | 50% or 60% |
| Annual Revenue | $2.7 billion to $4 billion |
| Jobs Supported | 9,500 to 10,000 |
| Type of Mushrooms | Agaricus family (white and brown buttons, portobellos), specialty mushrooms (oyster, shiitake, maitake, beech, enoki, pom pom) |
| Growing Operations | 60-61 mushroom farms, "mushroom houses" or "doubles" |
| Labor | Mostly from the local Hispanic community |
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What You'll Learn

Kennett Square's annual Mushroom Festival
Kennett Square, a borough in Chester County, Pennsylvania, is known as the "Mushroom Capital of the World". The region, which includes Kennett Township, produces over 60% of the mushrooms grown in the United States, with more than 500 million pounds of mushrooms produced annually. This equates to roughly half of the nation's mushroom supply.
The history of mushroom farming in Kennett Square dates back to the late 1800s when William Swayne, a local florist, began growing mushrooms under the benches of his greenhouses. Inspired by the success of the Swayne family, others in the region soon followed suit, and mushroom farming became the principal occupation for many in the area.
Today, Kennett Square celebrates its fungi heritage with its annual Mushroom Festival. The festival, which has been running for over 37 years, offers a range of fun, family-friendly activities, from a fried mushroom-eating contest to a painted mushroom silent auction. It also raises money for local nonprofit organizations and provides support for local farmers.
The festival is a testament to the impact that mushroom farming has had on the local community and economy. Mushroom farming is the leading agricultural pursuit in Chester County, bringing in nearly $4 billion in annual revenue. The industry employs almost 10,000 workers, many from the area's large Hispanic community, and has faced challenges such as labour shortages, public resistance to odours, water usage, and compost disposal issues. Despite these challenges, Kennett Square's mushroom industry continues to thrive and is an essential part of the local economy.
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The history of mushroom farming in Kennett
Kennett Square in Chester County, Pennsylvania, has been dubbed the "Mushroom Capital of the World". The region, along with its surrounding areas, produces over 500 million pounds of mushrooms annually, accounting for more than half of the total mushroom crop in the United States. The history of mushroom farming in Kennett can be traced back to the late 1800s when William Swayne, a successful florist in Kennett Square, came up with the idea of growing mushrooms beneath his greenhouse benches. He imported spawn from England and built the first mushroom house in the area. However, it was his son, J. Bancroft Swayne, who took the business to new heights, establishing a spawn plant and a cannery in addition to the growing houses.
The success of the Swayne family inspired others to venture into mushroom farming, and thus began the region's journey towards becoming the mushroom capital of the world. By the 1950s, there were hundreds of mushroom farmers in Chester County, with Italians constituting a majority of them. The collaboration between the Quakers, Italians, and Mexicans played a pivotal role in establishing Kennett Square as a global leader in mushroom production. The industry has faced challenges, including labour shortages, resistance from the local community due to odour, water usage, and compost disposal issues, as well as the consolidation of larger farms and the closure of smaller ones.
Despite these hurdles, Kennett Square's mushroom industry continues to thrive, contributing nearly $4 billion in annual revenue to the county's economy. The industry provides employment to thousands of people, particularly from the area's large Hispanic community. The landscape of Kennett Square is dotted with mushroom "barns", "houses", and "doubles", where the mushrooms are cultivated. The bulk of the mushrooms produced belong to the Agaricus family, including the ubiquitous white and brown buttons, as well as the large portobellos. Additionally, the region also produces specialty mushrooms such as shiitake, oyster, maitake, beech, enoki, and pom pom.
The annual Mushroom Festival in Kennett Square celebrates the region's contribution to the country's mushroom supply, attracting thousands of visitors each year. The festival features various events, including a fried mushroom-eating contest and a painted mushroom silent auction, providing entertainment for all ages while supporting local farmers and the community.
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Kennett Square's mushroom industry workers
Kennett Square in Chester County, Pennsylvania, is known as the "Mushroom Capital of the World". The region, along with its surrounding areas, produces more than 500 million pounds of mushrooms annually, accounting for over half of the total mushroom crop in the United States. The industry is a significant contributor to the local economy, generating nearly $4 billion in revenue and supporting 9,500 jobs.
The history of mushroom farming in Kennett Square dates back to the late 1800s when William Swayne, a local florist, began growing mushrooms under the benches of his greenhouses. Inspired by the success of the Swayne family, others in the region followed suit, and mushroom farming became the principal occupation for many. Today, the industry is sustained by a diverse workforce, with the large Hispanic community in the area constituting a significant portion of the almost 10,000 workers employed in mushroom farming.
The work of mushroom farming is labour-intensive, requiring dedicated workers who are knowledgeable about the unique process of fungus farming. The industry has faced challenges in finding labour, and public resistance due to issues like odour, water usage, and compost disposal. However, the industry continues to thrive, with production increasing and the development of new trends like the "blend" technique, which combines chopped mushrooms with recipes, highlighting the nutritional value of mushrooms.
The success of the mushroom industry in Kennett Square can be attributed to the collaboration and community among the farmers. In the early days, mushroom farmers would gather at places like the Kennett Square Inn or Sam's Sub Shop on State Street to share ideas and learn from each other's experiences. This spirit of cooperation has persisted, with companies like Phillips Mushrooms pioneering the specialty mushroom segment and the Mushroom Council promoting sustainable cooking techniques.
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Mushroom farming methods in Kennett
Kennett Square in Chester County, Pennsylvania, is known as the "Mushroom Capital of the World." The borough produces around 60% of all the mushrooms grown in the US, amounting to over 400 million pounds of mushrooms annually. Despite this, there are no farms within the borough itself.
The history of mushroom farming in Kennett Square dates back to the late 1800s when a florist named William Swayne began growing mushrooms under the benches of his greenhouses. Swayne purchased spores from England and built the first mushroom house in the area. His son, J. Bancroft Swayne, took over the business and expanded it, constructing a spawn plant and a cannery in addition to the growing houses. The success of the Swayne enterprise inspired others to take up mushroom farming as their primary occupation.
In the 1920s, an influx of immigrants from Europe brought new mushroom farming techniques to the region, further expanding the industry. Today, Kennett Square and its surrounding areas, including Kennett Township and parts of Berks County, PA, and northeastern MD, are home to over 2,000 growing houses. These farms cultivate a diverse range of mushroom species, including the traditional white button mushrooms, as well as specialty mushrooms such as oyster and shiitake.
The mushroom industry in Kennett Square has a significant economic impact, contributing nearly $4 billion in annual revenue to Chester County. It supports various ancillary industries, including packaging and transportation, and provides thousands of jobs for the local community. The region celebrates its unique connection to mushrooms with the annual Mushroom Festival, which has been held for over 37 years.
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Kennett's place in the US mushroom industry
Kennett Square, a borough in Chester County, Pennsylvania, is known as the "Mushroom Capital of the World". The region, which includes Kennett Township, produces more than 500 million pounds of mushrooms annually, accounting for more than half of the total mushroom crop in the United States. This industry generates nearly $4 billion in annual revenue for the county and supports 9,500 to 10,000 jobs, making it a key economic driver for Chester County and Pennsylvania.
The history of mushroom farming in Kennett Square dates back to the late 1800s when William Swayne, a local florist, began growing mushrooms under the benches of his greenhouses. He sourced spores from Europe, and his son, J. Bancroft Swayne, later turned the venture into a commercial success, constructing the first mushroom house in the area. Inspired by the Swayne family's achievements, others in the region followed suit, making mushroom cultivation their primary occupation.
Over time, Kennett Square became a hub for mushroom production, with a unique collaboration between Quakers, Italians, and Mexicans contributing to its success. By the 1950s, hundreds of mushroom farms operated in Chester County, with many owned by Italians. Today, the region continues to be a global leader in the mushroom industry, with a high concentration of growing operations in Southern Chester County.
The mushrooms grown in Kennett Square belong mostly to the Agaricus family, including the common white and brown button mushrooms and the large portobellos. However, specialty mushrooms such as shiitake, oyster, maitake, beech, enoki, and pom pom are also cultivated, contributing to the region's diverse mushroom offerings.
While Kennett Square itself does not have any mushroom farms within its borough limits, the surrounding area is dotted with mushroom "barns," "houses," and "doubles"—single-level cinder block buildings where mushrooms are grown indoors. The industry faces challenges such as labour shortages, public resistance to odour, water usage, and compost disposal issues, but it continues to thrive, with production consistently increasing.
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Frequently asked questions
Kennett Square in Chester County, Pennsylvania, is known as the "Mushroom Capital of the World." The region, along with its surrounding areas, produces more than 500 million pounds of mushrooms annually, accounting for more than half of the total mushroom crop in the United States.
Mushroom farming is a significant contributor to the local economy of Kennett Square and Chester County. The industry generates nearly $4 billion in annual revenue and supports around 10,000 jobs, making it a vital economic driver for the region.
The history of mushroom farming in Kennett Square dates back to the late 1800s when William Swayne, a local florist, started growing mushrooms under the benches of his greenhouses. His son, J. Bancroft Swayne, turned the business into a commercial success, inspiring others to follow suit. Over time, Kennett Square became the centre of mushroom production in the United States.
























