Clover Stornetta Farms

The Petaluma Cooperative Creamery began distributing "Clover" brand dairy products to homes and stores in the city of Petaluma in the early 1900s. Eventually the company started to expand and sold their products throughout Sonoma County and Marin County. The population of both counties grew rapidly and eventually "Clover" brand products were being sold to almost every grocery store in the four counties of the North Bay. In 1975, the largest fire in Petaluma's history occurred, causing some destruction to the dairy cooperative, destroying the processing and bottling line along with the cooler.

In 1977, the owners of Clover bought the wholesale distribution from the co-op after deciding not to rebuild their own co-op facility. Clover also bought the Stornetta Dairy in the city of Sonoma. In 1984, the owners of Clover Stornetta decided to move their company and the whole distribution back to the company's original city of Petaluma. In June 1991, Clover Stornetta opened a new milk processing facility at their current location in Petaluma. (The Stornetta Dairy in Sonoma was Clover's only bottling plant at the time.) The equipment in Sonoma had been antiquated and a large amount of the work had to be done manually. With the new automated plant run by computerized controls, Clover became able to triple the output of the former plant with the same amount of manpower.

Clover Sonoma introduced their "Clover Promise of Excellence" program in 1994 (as the North Coast Excellence Certified program) and a full third-party certification was later added in 1999. 'Clover Promise of Excellence' is a set of criteria each of Clover Sonoma's family farms must adhere to in the areas of animal welfare, environmental stewardship, and milk quality.

In 2016, Clover Sonoma became a Certified B Corporation, committing to performance assessment in five categories: governance, workers, customers, community, and the environment.

In 2017, the company changed its name to Clover Sonoma to honor its Sonoma County heritage. Clover Sonoma's conventional product line packaging had remained unchanged since the 1980s and its organic product packaging was untouched since the early 2000s. The Clover Sonoma brand update included a full packaging redesign across product lines.

In 2020, Clover Sonoma announced its B Corporation recertification and unveiled the first fully renewable plant-based milk carton in the United States as part of its continued focus on sustainability.

In December 2021, 70% of the shares of Clover Sonoma is acquired by Colombian dairy product company Alpina Productos Alimenticios.