Bridal-Wreath Spiraea (Vanhoutte) - A Spring Blooming Bridal-wreath Spiraea With Tiny White Flowers. Also Known As The Vanhoutte Spiraea, This Shrub Grows Six To Eight Feet Tall And 10 To 12 Feet Wide. The Bridal-wreath Has Arching Branches That Curve To The Ground And Is Covered With Tufts Of Small White Flowers In Late Spring. Leaves Are Greenish Blue. A Sun Loving Plant Adaptable To Most Soils Often Used As A Hedge Or Border. Photo