Many of the seedlings will be true to type. This is very unusual when propagating by seed. Cuttings may be rooted under mist systems or in a humidity chamber in the summer. A root-promoting hormone dip may help rooting. Of course, cuttings will produce fruit exactly like the fruit of the mother tree.
Mayhaws appear to be initially graft-compatible with any hawthorne.
In East Texas, the parsley hawthorne is considered an excellent rootstock. Mayhaws can be grafted onto Washington hawthorne seedlings which are available commercially, but their performance at maturity has not been determined. Mayhaw seedlings are probably the best choice as a rootstock, especially in damp soils. Repeat the application in late August or early September if the trees are not vigorous and if adequate water is available to prevent scorching. Do not apply fertilizer within eight inches of the trunk.