The Arboretum de Grignon (French pronunciation: [aʁbɔʁetɔm də ɡʁiɲɔ̃]; 0.8 hectares) is an arboretum located within the campus of the Institut des sciences et industries du vivant et de l'environnement (AgroParisTech) on Avenue Lucien Brétignières, Thiverval-Grignon, Yvelines, Île-de-France, France.
At that time, the arboretum contained approximately 230 specimens (66% deciduous, 34% conifers).
In response, the Association de l'arbre de fer was established in 2001 to protect and enhance the natural environment of the former Institut National Agronomique Paris-Grignon.
Today the arboretum contains about 125 tree species and varieties, including notable, mature specimens of Cedrus atlantica, Fagus sylvatica var.
"Tortuosa", Ginkgo biloba, Gleditsia triacanthos, Parrotia persica, Pinus nigra subsp.