small, white flowers in sumptuous clusters along leafy spirea shrub branches

shrub spirea blooming sumptuous abundance tiny flowers bloom bridalwreath cascading habit decorative plant dense drooping branches flowering bush garden gardening hedge large luxuriant may ornamental prolific small white spiraea prunifolia spring bloomer thriving vanhoutte vigorous whiteflowered bridal wreath clusters exuberant floral novorossiysk springbloomer van houtte wallpaper inflorescence outdoor