Genus Buddleia Species x Cultivar 'SMNBDBT' Pugster® Blue Patent 28794 Common Name Pugster® Blue Butterfly Bush Zone 5 to 9 Habit Low mounding, spreading habit. Moderate growth rate. Height 2 feet Spread 2 to 3 Feet Foliage Medium green foliage. Deciduous. Flower true-blue blooms, mid-summer to frost Flower Color Blue Culture Full sun. Categories: Deciduous Shrub Proven Winners® Color Choice® Click to share on Facebook (Opens in new window)Click to share on Twitter (Opens in new window)Click to share on Pinterest (Opens in new window)Click to share on Tumblr (Opens in new window) Description Photo courtesy of Proven Winners.