Alter Botanischer Garten Hamburg, Botanical garden in Neustadt, Hamburg, Germany

The Alter Botanischer Garten Hamburg occupies the site of the city's botanical garden founded in 1821 by Johann Georg Christian Lehmann, on the Wallring at Stephansplatz. Its five interconnected greenhouses, covering 2,800 m², were built in 1962–1963 by architect Bernhard Hermkes. They include the Schaugewächshaus, the Farnhaus, the Palmfarnhaus, a succulent house and a tropical house 13 metres high.

A professor established this garden in 1821 as a place for cultivating and studying plants from different regions. About a century later, an alpine garden section was added to the grounds, expanding the types of plants on display.

The garden's name survives in the Schaugewächshaus and Tropengewächshäuser labels still used for its glasshouses. Herbal and medicinal plantings are grouped around the former city moat, a trace of the Wallring fortifications. The Palmfarnhaus keeps ancient plants that Johann Georg Christian Lehmann described in 1834.

The garden lies on the Hamburg Wallring at Stephansplatz and is open daily without charge. The five greenhouses are interconnected, so a single route passes through the show house, fern house, palm fern house, succulent house and tropical house. The tropical house reaches 13 metres in height.

The five greenhouses were designed by architect Bernhard Hermkes and built between 1962 and 1963, covering 2,800 m² in total. The tropical house alone spans about 800 m² and reaches a maximum height of 13 metres. The complex stands on the site of the city's botanical garden founded in 1821 by Professor Johann Georg Christian Lehmann.