The hybrid elm cultivar Ulmus 'Hamburg' was originally raised by the Plumfield Nurseries, Fremont, Nebraska, circa 1932, after its discovery by Mr. Lloyd Moffet in a bed of Siberian Elm Ulmus pumila seedlings from Tekamah. It was later marketed by Interstate Nurseries, Hamburg, Iowa, from 1948, as 'Interstate's New Hamburg Hybrid Elm'.
The development of Ulmus 'Hamburg' began at Plumfield Nurseries in Fremont, Nebraska, around 1932, when Lloyd Moffet discovered the tree among Siberian Elm seedlings from Tekamah. It was later marketed by Interstate Nurseries under a new name starting in 1948.