The Botanischer Garten der Johann Wolfgang Goethe-Universität Frankfurt am Main, also known as the Botanischer Garten Frankfurt am Main, is a botanical garden and arboretum maintained by the Goethe University. It is located at Siesmayerstraße 72, Frankfurt am Main, Germany, and opens daily in the warmer months.First Garden: near the Eschenheimer Tor . Frankfurt's first botanical garden was created in the years 1763-1774 by Johann Christian Senckenberg, and was operated by the Senckenberg Foundation as a hortus medicus for the cultivation of medicinal herbs for the foundation's public hospital and medical institute. Its site, about 1 hectare in size, was patterned on Carl Linnaeus' garden in Uppsala. Until 1867 every director was a physician. By 1903, the garden cultivated more than 4,000 species but its extent had been gradually reduced by hospital expansion until just 7,000 m² remained.Second Garden: adjacent to the Palmengarten . After lengthy negotiations between the city and foundation, a new, 1.4-hectare site was found just east of the Palmengarten. The move took place in 1907-1908. When the university was founded in 1914, the garden became a research facility. In the 1930s it was improved by an arboretum, alpine garden, and sand dunes.