Walnut Hill Farm was founded in 2013 by John and Mary Lee Calihan as a way to provide the freshest and most flavorful produce as well as a local food source for the kitchens of Calihan Catering.  The farm is located in south central Wisconsin, near the town of Brodhead.  With the addition of a barn and greenhouse in 2014, the farm enjoyed its first harvest with a wide variety of vegetables.  In 2015 the Calihans expanded the farm by adding an herb garden, blueberry and strawberry plantings and a small apple orchard.