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 hybrid elm cultivar Ulmus 'Hamburg' originated at Plumfield Nurseries, Fremont, Nebraska, approximately 1932, after Lloyd Moffet found it among Siberian Elm seedlings from Tekamah. It was later distributed by Interstate Nurseries as 'Interstate's New Hamburg Hybrid Elm' starting in 1948.