International Garden Expo 83 (Internationale Gartenbauausstellung 83) was a garden festival containing 170 exhibition contributors. The international horticultural exposition was recognised by the Bureau International des Expositions (BIE) and held from April 28 to October 9, 1983, at Westpark in Munich, Germany. Ralph Siegel wrote the Flower Serenade as official song of the exhibition; it was recorded by Hugo Strasser and his orchestra. The German Federal Post Office issued a special stamp with a stylized flower.