Snowmound Spirea (Spiraea nipponica 'Snowmound') is a hardy, 3–5 foot deciduous shrub known for its dense, mounded form, blue-green foliage, and arching branches covered in white, late-spring blooms. It thrives in full sun, adapts well to various soil types, and is ideal for borders, hedges, or foundation plantings due to its low maintenance. 
Key Details and Care
Light: Full sun to partial shade.
Growth Rate: Moderate to fast.
Size: 3-5 feet tall and 3-6 feet wide.
Bloom Time: Late spring to early summer.
Soil: Average, well-drained soils; tolerant of clay.
Maintenance: Low; prune after flowering.
Attributes: Deer-resistant and attracts pollinators. 
This shrub is excellent for adding a "fresh" look to the landscape with its cascading, snowy-white flowers. Its blue-green foliage turns yellow or burgundy in the fall, providing season-long interest.