The records of the Washington Society of Landscape Painters measure 1 linear foot and date from 1917 to 2000. The collection documents the activities of the society through scrapbooks, general records, printed matter, correspondence, and photographs.

The papers of printmaker and landscape painter Benson Bond Moore date from 1902 to 1995 and measure 5.7 linear feet. Found within the papers are biographical material, letters, scattered personal business records, notes and writings, twelve scrapbooks, printed material, and photographs. The papers also contain extensive artwork in the form of drawings and sketches, etchings, lithographs, and a few oil paintings.

The Malcolm Howard Dill Collection contains 17 35mm slide reproductions of photographs of and design plans for private and community projects in Ohio and Indiana by the landscape architect, Malcolm Howard Dill.

This collection contains over 37,000 35mm slides, 3,000 glass lantern slides and garden files that may include descriptive information, photocopied articles (from journals, newspapers, or books), planting lists, correspondence, brochures, landscape plans and drawings. Garden files were compiled by Garden Club of America (GCA) members for most of the gardens included in the collection. Some gardens have been photographed over the course of several decades; others only have images from a single point in time. In addition to images of American gardens, there are glass lantern slides of the New York Flower Show (1941-1951) and trips that GCA members took to other countries, including Mexico (1937), Italy, Spain, Japan (1935), France (1936), England (1929), and Scotland. A number of the slides are copies of historic images from outside repositories including horticultural and historical societies or from horticultural books and publications. The GCA made a concerted effort in the mid-1980s to acquire these images in order to increase its documentation of American garden history. Because of copyright considerations, use of these particular images may be restricted.

The collection contains the project design records of Rudy J. Favretti. , a landscape architect and professor noted for his extensive work in historical restoration of gardens, parks, and landscapes. He donated his collection of garden design files, plans, and images to the Smithsonian's Archives of American Gardens in March 2011.

The papers of American Impressionist painter Edmund Greacen measure 1.2 linear feet and date from 1897-1972, bulk 1905-1949. The collection consists of biographical information and correspondence both personal and professional in nature, pertaining to his career as well as Greacen's various affiliations including the National Academy of Design, the National Arts Club, the Manhattan School of Art, and the Grand Central School of Art. Writings by Greacen, including an essay, "The Origins of Landscape Painting," and an unpublished book titled "Logic in Drawing" elucidate his perspective on art traditions and art education. There are works of art including pencil drawings and drypoint etchings, as well as photographs depicting portraits of the artist, group portraits documenting Greacen's various academic and professional affiliations, and reproductions of works of art. Also included exhibition catalogs, brochures, and other printed material.

The Robert M. Fletcher Collection contains 268 35mm color slides documenting Southern California gardens designed by landscape architect Robert M. Fletcher.

The Lois W. Poinier Collection documents the work of Lois W. Poinier, a self-taught garden designer who designed scores of gardens, most of them in New Jersey.

The Maida Babson Adams American Garden Collection documents the work of Molly Adams, a free-lance garden photographer who photographed hundreds of private and public gardens, many of them in the mid-Atlantic region, from the late 1950s through the mid-1990s. It includes slides, photographic prints, negatives and transparencies. A significant number of images document the work of landscape designers Nelva M. Weber, Alice Recknagel Ireys, and Friede Stege. Roughly 50 gardens do not have an identified location. Some images have captions and other information written on them.

The Perry H. Wheeler Collection includes the design, client and business records of Perry H. Wheeler, a landscape architect best known for his work on numerous townhouse gardens in the Georgetown neighborhood of Washington, D.C., during the 1960s as well as the redesign of the White House Rose Garden in collaboration with Rachel Lambert ('Bunny') Mellon during the Kennedy administration.