Wilhelm Pfitzer (21 January 1821 - 31 July 1905) was a German horticulturist.
Wilhelm II Pfitzer in 1844, founded a nursery on a property at Militärstraße, Stuttgart in Baden-Württemberg, Germany, where his father, Wilhelm I Pfitzer, owned a property for his private gardening interest. Wilhelm II founded a family firm that exists to this day and which has been a major influence on the development of many flower types, especially Dahlias, Gladioli, and Canna.[1]
With his wife, Friederike, née Schickler (married 12 July 1849, died 27 December 1892), he extended the nursery around the vegetable and flower seed trades.[1]