The Flutterby® Series of Buddleja have been bred to be sterile and produce no seed so are non invasive. The cultivars are compact and mound forming in growth producing lavender flowers through early to late summer.
The Flutterby series of Buddleja were developed by Peter Podaras in the USA at Cornell University, New York and are marketed by Ball Ornamentals. This series also have sterility or low fertility. A hybrid created from Buddleja davidii X Buddleja alternifolia) x (Buddleja davidii X Buddleja alternifolia).