Mop Top Butterfly Bush'Mop Top' butterfly bush delivers a distinctive fountain habit with long, weeping branches that create graceful movement in the garden. Pale purple flower clusters bloom in springearlier than most butterfly bush varietiesfilling the air with fragrance and drawing pollinators when they're needed most. The flowing, cascading form makes this an ideal specimen for mixed borders, woodland edges, or as a focal point where its natural architecture can be