Buddleia Nanho Purple A compact buddleia or butterfly bush for the smaller garden, Buddleja davidii Nanho Purple is a medium-sized, deciduous to semi-evergreen shrub with arching branches and a dense habit. The long, elliptical leaves are grey-green, and may be retained in mild winters. From June to September, the shrub bears dense, cylindrical spikes of sweetly scented, light to rich purple flowers; these are very attractive to butterflies, hoverflies and other pollinators. Prune back last year’s growth to 3-4 buds in mid-spring to keep it shapely. Buddleia Nanho Purple holds the RHS Award of Garden Merit. Site: Tolerates exposureSoil: Any well-drained, light soilPosition: Full sunSeason of interest: Summer and early autumn in particularHardiness: Fully hardyHeight: up to 6’6” (2m) Spread: 6’6” (2m), sometimes smaller