Cultivation
There are no known cultivars of Ulmus thomasii, nor is it known to be in commerce. The species is occasionally grown beyond its native range as a specimen tree in botanical gardens and arboreta, for example in northwestern Europe, but not commonly cultivated in northern Europe, being unsuited to the region's more temperate, maritime climate.
Ulmus thomasii was crossed experimentally with Japanese Elm (Ulmus davidiana var. japonica) at the Arnold Arboretum in Massachusetts, but no clones were released to commerce. Seedlings arising from crossings with Siberian elm (U. pumila) at the Lake States Forestry Experimental Station in the 1950s all perished, a classic case of hybrid lethality.
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