From the Smithsonian Magazine:

John Bartram's 102-acre spread sloping down to the Schuylkill River was a grand incubator of native plants and the first botanical garden in the United States. Here, John Bartram and his sons William and John Jr. planted specimens they gathered from a large swath of the New World to be sold in the Old World. They are credited with creating the country’s first plant catalog in 1783, a 22-by-17-inch sheet of paper with almost 220 “trees, shrubs, and herbacious plants.” To round out this horticultural enterprise, the Bartrams also ran a nursery. The Bartrams sent seeds to Thomas Jefferson for planting at Monticello and in 1784, the Continental Congress adjourned specifically to visit Bartram’s garden.

The Story of Bartram's Garden | Smithsonian (smithsonianmag.com)