Green Hills Farm Arboretum sits on the 68-acre Green Hills Farm property purchased in 1934 by Nobel and Pulitzer Prize winning author Pearl S. Buck. Her former home, now the Pearl S. Buck House National Historic Landmark Museum, is part of this historic estate, as is the headquarters of the humanitarian aid foundation she created, now called Pearl S. Buck International. Pearl S. Buck saw the peaceful rural acreage as the perfect environment to raise a family, provide creative thought, and enjoy the natural serenity of a treed property. She invested time and financial resources to enhance the quality and number of tree specimens and shrubbery on the property. Ms. Buck was very fond of nature and wished her home in Pennsylvania to be reminiscent of her previous home in China. The farm was also used by the local community for gatherings and became a beloved community space.

Pearl S. Buck International has continued in that spirit to enhance, maintain and develop the aesthetic environment to remain arboreal and pleasing. In 2009, the property was designated preserved open space by the Bucks County Commissioners to be forever preserved under a conservation easement. Deer, fox and sometimes a bear can be seen drinking from the streams on the grounds and resting from the summer heat in the cool shade of this treed property. A variety of birds and bats nest and roost on the boughs and branches of the trees. The green open spaces enhance the visibility of the trees and provide beautiful panoramic views of the property. Visitors to the property will experience the beauty of 55 varieties of tree, including Japanese maple, flowering dogwood, Colorado blue spruce, sweetbay magnolia, rhododendron, and a Franklinia.