Richard Hansen (horticulturist)

He founded the Sichtungsgarten Weihenstephan, where he conducted trials of herbaceous perennials to evaluate their potential for use in gardens and public green spaces.

[3] During the Second World War, Hansen worked under Tüxen at the Agency for Theoretical and Applied Plant Sociology (Arbeitsstelle für theoretische und angewandte Pflanzensoziologie) in Hanover.

[2] Foerster, who was the leading expert in the horticultural field of herbaceous perennials, was left stranded behind the Iron Curtain after the war, and it was Hansen who took over from him.

[4] In 1947, Hansen began his career at the State Teaching and Research Institute for Horticulture (Staatliche Lehr- und Forschungsanstalt für Gartenbau) in Weihenstephan as a plant science lecturer.

His approach attracted so much interest in Germany and abroad that his 1981 book, Die Stauden und ihre Lebensbereiche, was translated into English under the title Perennials and their Garden Habitats in 1993.