When the White Lilacs Bloom Again () is a 1929 German silent romance film directed by Robert Wohlmuth and starring Georg Henrich, Vera Schmiterlöw and Walter Grüters. It takes its title from a popular song of the era. A 1953 film was made using the same name.
It was made at the Emelka Studios in Munich. The film's sets were designed by Ludwig Reiber.