Whoa! Koreanspice viburnum ( Viburnum carlesii ) is already known for fabulous flowers, but Spice Cowboy viburnum outdoes them all, with giant snowball flowers of a truly remarkable size and the delicious spicy-sweet fragrance that makes it such a perennial favorite. Fabulous orange-red fall color substantially expands season of interest. This fast-growing selection can be trained into a small tree or grown as a large shrub- either way, it will turn heads.