The Siberian elm cultivar Ulmus pumila 'Dropmore' was grown from seed collected in Harbin, Manchuria, China, by F. L. Skinner, of Dropmore, Manitoba.'Siberian Elm', South Dakota Dept. of Agriculture, Forestry Div., Pierre, S.D.; sdgs.usd.edu Green reported (1964) a suggestion to merge the Siberian elm cultivars 'Harbin' and 'Manchu' with 'Dropmore', as all came from the Harbin area.Arnoldia : Bulletin of the Arnold Arboretum, 24 July 1964, Vol 24 Nos 6-8, pp.40-80 In the event, 'Dropmore' appears to have superseded these earlier cultivars.Santamour, Frank S.; Bentz, Susan E. (May 1995). 'Updated Checklist of Elm (Ulmus) Cultivars for use in North America', Journal of Arboriculture. 21 (3); pp.122–131.
The cultivar 'Chinkota' was raised in North Dakota from 'Dropmore' seed.Collins, P. E. (1955). Chinkota Elm. South Dakota Farm and Home Research. 7 (1), 14–16, 27. South Dakota State University, Brookings, USA.
Description 'Dropmore' is a fast-growing bushy form producing small leaves.
Pests and diseases See under Ulmus pumila.
Cultivation The tree remains in commercial cultivation in the United States. Considered cold-hardy far into Canada , it did not perform well in the hot, arid, climate of Arizona as part of the elm trials in conducted by the Northern Arizona University at Holbrook.
No specimens of 'Dropmore' are known to survive in the UK. In 2022 and 2025 Brighton and Hove Council listed by this name, without provenance or identification information,Vivienne Barton, 'Great elms of Brighton and Hove', 2022, bhgreenspaceforum.org'Rare elms in the spotlight for Sussex Tree Festival', 11 June 2025 a vase-shaped elm in Tenantry Down Road,Elm in Tenantry Down Road, Brighton - Google Maps, April 2021, access date: 26 June 2025 with fewer leaf-vein pairs than 'Dropmore' and without the tiny marginal serrations and neat tapering leaf-tip of 'Dropmore'.Leaves of Tenantry Down Road elm ; Tenantry Down Road elm
Accessions North America Dominion Arboretum, Ottawa, Ontario, Canada. No acc. details. Morton Arboretum, US. Acc. no. 883–85; tree from Inter-State Nursery, Hamburg, Iowa.Photographs of Morton Arboretum 'Dropmore', Acc. no. 883-55; cirrusimage.comMorton Arboretum herbarium, U. pumila 'Dropmore' herbarium flowers specimen, 6326794
Nurseries North America Lee Nursery Inc. , Fertile, Minnesota, US. Lincoln Oakes , Bismarck, North Dakota, US.
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