Tags: Cultivar (Cultivated Variety).
Buddleja davidii ‘Monum’ (selling name Nanho Purple) is a hybrid cultivar derived from a crossing of var. nanhoensis and ‘Royal Red’ back-crossed with ‘Royal Red’ by the wholesale Monrovia Nursery California in 1980. The shrub was accorded the RHS Award of Garden Merit (record 684) in 2002. [1]