Is it possible to take some part of a rock elm tree to begin a new tree?
Rock elm seeds germinate within a week or two after dispersal if moisture conditions are favorable. But despite high seed viability, rock elm is difficult to establish from seed.
Most elms are also considered difficult to root by means of cuttings. However, leaf-bud cuttings, consisting of leaf blade, auxiliary bud, and a shield of stem tissue, treated with a growth hormone and held under constant mist on a rooting medium of sand or mica, produced satisfactory results for several species of elm including rock elm .
Here’s a link to a fact sheet from NC State University with general instructions for propagation from stem cuttings:https://content.ces.ncsu.edu/plant-propagation-by-stem-cuttings-instructions-for-the-home-gardener