We have hedges of this hardy deciduous shrub everywhere on the streets, near the sidewalk but I never paid attention to its flowers till now.
The tiny flowers are beautiful, pink-purple colored, on 10-20cm (4-8 in) cone shaped panicles. With their long stamens the flower stems looks like bottle washer brushes but on a closer look they are really beautiful.
Billiard Spireas flower from June to August doing well in full sun or part shade exposure.
These summer blooming shrubs grow to a height 1.5 m - 2 m with the same spread and they are decorative kitchen garden plants or flowering hedges, when planted in groups.
Spiraea x billiardii 'Triumphans' is a hybrid between Spiraea douglasii and Spiraea salicifolia.