Bruno Peyronel introduced an alpine garden in 1962–1963, in 1969 a new greenhouse was built for tropical and subtropical species, in 1986 another greenhouse added for succulent plants, and in 2006 another for South African plants.Today the garden proper cultivates around 2000 species, with an additional 300 species in the alpine garden, about 500 species in the arboretum, and a further 1000 species in greenhouses.