About the Spiraea - Snowmound :
The Snowmound Spirea, Spiraea nipponica, is an excellent dwarf shrub, with dense dark green foliage and masses of pure white flowers in May. Great for use as a foundation plant, in the shrub border or in a garden situation.
Prune in the early spring before growth starts if shaping is needed and then again after the flowers are done blooming. This deciduous shrub prefers full sun to partial shade. It does best in well-drained soil with moderate to high levels of moisture. Prune older stems to the ground to thin and rejuvenate.