Fothergilla x gardenii ‘Mt. Airy’ Witch-alder Description This small-medium shrub has fragrant bottlebrush flowers in spring and excellent fall color. Perfect for a shrub border. Fantastic plant for all season interest. A perennial favorite of our staff! Sizes & Prices All Fothergilla Characteristics Hardiness Zone: 4 Light requirements: Sun/Part Sun Height: 5-6' Spread: 3-4' Native: Yes Sizes & Prices Size: 18" Ht $49.98 Other Information Mountain Witch-alder Fothergilla major Zone: 4 Sun/Part Shade HT: 6-9' Blue Shadow Fothergilla Fothergilla major 'Blue Shadow' Zone: 5 Sun/Part Shade HT: 3-5' Witch-alder Fothergilla x gardenii 'Mt. Airy' Zone: 4 Sun/Part Sun HT: 5-6'