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 Frederic H. Leubuscher garden portfolios include images that document Leubuscher's professional landscape and garden design work. The collection includes photographs of awards received by Leubuscher for a number of garden show exhibits that he designed as well as photostatic copies of a booklet about artificial pools he wrote that was published by the Fels Engineering Corp. of Essex Fells, New Jersey.

The Corliss Knapp Engle slide collection contains 35mm slides of gardens, garden features, flower shows, and flora photographed by Corliss Engle, a self-taught photographer and horticulturalist. Much of the collection is comprised of photographic documentation of numerous private and public gardens that she visited throughout the United States. Of particular note are images of Engle's own garden in Brookline, Massachusetts, spanning three decades; they provide excellent insight into the development and evolution of a garden over time. Portions of the collection highlight Engle's involvement with the Garden Club of America and the GCA's Garden History and Design Committee. The collection also includes various notes, lecture scripts, brochures, programs and articles on garden and plant-related themes generated or compiled by Corliss Knapp Engle.

The Starr Ockenga Collection includes materials generated or compiled by Ockenga for the writing of her books, 'Earth on Her Hands: The American Woman in Her Garden' (1998, Clarkson Potter) and 'Eden on Their Minds: American Gardeners with Bold Visions" (2001, Clarkson Potter).' Both books feature several individual chapters, each describing a garden owner and their garden.

The Thomas Warren Sears Photograph Collection documents examples of the design work of Thomas Warren Sears (1880-1966), a landscape architect and amateur photographer from Brookline, Massachusetts. Sears, who was based for most of his career in Philadelphia, designed a variety of different types of landscapes ranging from private residences, schools, and playgrounds to parks, cemeteries, and urban housing developments located primarily in Pennsylvania, Maryland, and New York. In addition to some of Sears' design work, images in the collection document Sears' domestic and foreign travels, design inspirations, and family. The collection includes over 4,800 black and white negatives and glass lantern slides dated circa 1899 to 1930. While most images show private and public gardens, there are a significant number of unidentified views and views photographed in Europe during two trips he took there in 1906 and 1908. Few images are captioned or dated. In addition, there are over 50 plans and drawings, most notably for Balmuckety in Pikesville, Maryland and Reynolda in Winston-Salem, North Carolina, and 3 monographs by or about Sears.

The Boris V. Timchenko collection includes project files, business records, and personal papers of Boris Timchenko, a modernist landscape architect based in the Washington, D.C. metropolitan area known for his work on The Watergate Development and the annual National Capital Flower and Garden Show.

The George Goodwin interviews relating to Frank Lloyd Wright measure 0.2 linear feet and date to 1992. Interviews conducted by Goodwin for the Frank Lloyd Wright Archives at Taliesin West, Scottsdale, Arizona, with architects, students, and clients who knew Wright and others who offer opinions on his work.

35mm slides of private and public gardens photographed by Brent Heath, co-founder of Brent and Becky's Bulbs in Gloucester, Virginia.

Collection consists of miscellaneous late nineteenth/early twentieth century scrapbooks containing postcards, trade cards, greeting cards, decals, and other ephemera.

The Richard Marchand Historical Postcard Collection contains approximately 1,200 35mm slide reproductions of postcard images depicting early twentieth century architectural and garden views of over 600 private estates throughout the United States. The collection includes views of estates owned by popular movie stars of the 1920s and 1930s, including Charlie Chaplin, Mary Pickford, Douglas Fairbanks, Claudette Colbert and Buster Keaton.