This European white birch is widely planted and reportedly escaped at scattered sites across northern regions of North America. In Ky. there have been colls. from JEFF (NCU), LAUR (BEREA), OLDH (DHL) and PIKE (CW), but these trees generally appear to be from persistent plantings, rather than truly naturalized plants. There are also a few old reports of the related northern species, B. populifera Marsh. and B. pumila L. (a dwarf birch), but these are highly dubious and unverifiable (M).