Gustav Sennholz (5 March 1850 in Frankfurt am Main – 24 August 1895 in Vienna) was a German-Austrian gardener and horticulturist.
Following studies in Kassel (Bergpark Wilhelmshöhe), he was associated with the "Gärtnerlehranstalt" in Potsdam (1869–70).
From 1874 to 1884, he worked as a gardener in Bockenheim, afterwards serving as munincipal gardener in Vienna (1884–1895).
[1][2] From 1885 to 1888, he supervised construction of the city's "Türkenschanzpark".
[3] The orchid species Dactyloglossum sennholzii is named in his honor.