Medium. New Resista-elm raised in America University of Wis and distributed by German Nursery Conrad Appeal. Hillier Nurseries are the exclusive partner for the UK and Ireland for the Resista-elm programme. This tree has a balanced crown and dominant central leader. It is fairly tough and suitable for urban planting. Conical crown and dark silky glossy leaves. Read our case study on the development of the Dutch Elm Disease resistant Ulmus 'New Horizon.