'Mount Airy' seems to be the most common cultivar of Witch-Alders in the US. It was selected from the Mount Airy Arboretum in Cincinnati, Ohio by Dr Michael A. Dirr for: its good bluish-green foliage color; its abundant display of larger flowers; its good yellow-orange-red fall color; its good vigor; and its 5 to 6 feet high size. It is offered by many nurseries and garden centers of the Midwest, the Mid-Atlantic, the Northeast, and the northern part of the South in the USA. This is actually a selection of Fothergilla x intermedia that is a hybrid between the Dwarf X the Large Witch-Alders. This cultivar of the Hybrid Witch-Alder does not bear fruit. It does need a good quality soil that is draining wet to moist to well-drained, and it can tolerate pH a little above 7.0.

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