Buddleja x wardii is very rare in cultivation and bears characteristics from both of its parents. The pale lilac flowers are borne in spring. The species is not fully hardy and best grown in a pot and provided with winter protection.
B. x wardii is a naturally occurring hybrid between B. alternifolia and B. crispa found and collected in 1924 by Frank Kingdon-Ward from mountain riverbanks in the Xizang province of China. The hybrid was named in honour of Ward by the English botanist Cecil Victor Boley Marquand.
The hybrid occurs naturally at elevations of 3000-3600m.