Wethersfield began with the purchase of two adjacent Dutchess County dairy farms of approximately 600 acres in 1937. Owner, Chauncey D. Stillman (1907-1989), conservationist and environmentalist, continued to purchase surrounding properties until the time of his death when the farm had grown to 1,200 acres.
Wethersfield was one of the first farms in the county to practice soil and water conservation. 12 ponds were constructed for irrigation and the prevention of soil erosion. Early conservation practices included crop rotation, contour strips and biodynamic farming; reforestation; pasture improvement; improved drainage of lowlands; terracing steep slopes; and woodlot improvement.
As an early member of the Dutchess County Soil Conservation District, Wethersfield hosted a tour of the farm as an excellent example of conservation practices to Delegates Attending the United Nations Scientific Conference on the Conservation and Utilization of Natural Resources Sponsored by the American Citizens Committee and the National Association of Soil Conservation Districts on August 20, 1949.