Buddleia davidii 'Nanho Blue' (Nanho Blue Butterfly Bush)Fast growing Compact form Silvery blue, fragrant flowers Attracts butterflies Drought tolerant Deer resistant Fast growing, compact, deciduous shrub with spectacular summer color. Clusters of silvery blue, fragrant flowers on spikes attract butterflies. Dense and compact, this selection is loaded with fragrant, 4 to 10" long flower spikes from July through September that attract loads of butterflies. Hardiness Zone 5 9 Height 5 6 ft Spread 4 5 ft