The show features large scale gardens, which range from elaborate landscaped displays to individual and club entries of a prize horticultural specimen.

The 2007 Show, Legends of Ireland, featured Pressed Plant Material (i.e. dried flower pictures) that "incorporated a Celtic Knot."

"[6] Entrants for that class typically have a mockup of the niche at home, where they practice assembling and lighting their entry in the months preceding the show.

In a Challenge class, entrants bring only pruning shears, and must use show-provided materials to interpret a theme within a limited amount of time.

[9] The site claims the PHS "uses horticulture to advance the health and well-being of the Greater Philadelphia region," and that their programs "create healthier living environments, increase access to fresh food, expand access to jobs and economic opportunity, and strengthen deeper social connections between people.

[11] This included the poinsettia, a plant then-newly imported from Mexico, which was exhibited by Colonel Robert Carr.

In 1981, total attendance was 230,000; 210,000 were guests who had paid admission, and the rest were exhibitors, judges, PHS members, and the press.

"[3] In 2021, the Philadelphia Flower Show was held outdoors at Franklin Delano Roosevelt Park in June instead of its usual location at the Pennsylvania Convention Center due to the COVID-19 pandemic.

[21] Historical art and photographs from 1829 to present relating to the PHS's Flower Show can be found on the Digital Archives of Pennsylvania Department of Education.