Find photos at your historical society, historical museum or library. Locally written books may feature classic older homes in your city and will include views of their gardens. Visit those historic homes with gardens that have been maintained in period style.
Consult books published during the 1930s. “The Fragrant Path” by Louise Beebe Wilder came out in 1932, and was republished in 1974 under the title “The Fragrant Garden.”
Read books about period gardens. The famous gardens at Sissinghurst Castle in England were created by Vita Sackville-West and Harold Nicholson during the 1930s. Their garden is the subject of many books, and Sackville-West wrote about gardening during that period. “The 1930s Home” by Greg Stevenson (2008) and "The 1930s House Manual" by Ian Rock (2005) are other good sources.
Search the Smithsonian’s Archives of American Gardens, which includes thousands of slides from the 1920s and 1930s.
Choose plants that have been in cultivation since the mid-1920s. Large rose gardens were popular during the 1930s, as were plants such as hydrangeas, lilacs and hostas. Heirloom rose growers provide the year that a rose came into cultivation, as do heirloom bulb growers, so it is easy to tell what kinds of roses or daffodils a 1930s garden held. Search for plants labeled “heirloom” and “antique.”