Genus Buddleia Species x Cultivar 'Purple Haze' Lo & BeholdÂ® Patent 24514 Common Name Lo & BeholdÂ® 'Purple Haze' Butterfly Bush Zone 5 to 9 Habit Low mounding, spreading habit. Moderate growth rate. Height 2 to 3 Feet Spread 3 to 4 Feet Foliage Medium green foliage. Deciduous. Flower Dark purple flowers. Blooms mid-summer to frost. Flower Color Dark purple 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.