Over time his business grew, and George Washington, Thomas Jefferson, and Joseph Bonaparte were among his customers when they visited the city during the Constitutional Convention in 1787.

[1] Landreth and his son David, who joined the company in 1820, were among the founders of the Pennsylvania Horticultural Society in 1827 and produced the first agricultural journal in the United States, Floral Magazine, in 1832.

[6] D. Landreth and Sons moved to Bloomsdale Farms to test seeds on 600 acres in Bristol, Pennsylvania, in 1847, where the company continued to grow.

Upon Perry's return in 1855, Landreth received the first major importation of Japanese seeds into the United States for cultivation and distribution, including the red shiso and wineberries.

[5] The catalogs featured illustrative woodcuts until the 1890s, when the company became one of the first to introduce photography to show how the plants appeared in real life.

The collection features roughly 30 plants, including the long-handled dipper gourd and the fish pepper, showcasing how instrumental they were to African-American survival and independence.