Spiraea nipponica 'Snowmound' Snowmound Spirea Description Blooms white flowers on old wood. Blue-green foliage emerges in the Spring followed by dark green then yellow to pink in Autumn.Bloom Period: Spring Growth Habit: Upright and vase-shapeMature Height: 3' to 4' (90 cm to 120 cm)Mature Spread: 2.5' to 3.5' (75 cm to 105 cm)Growth Rate: Moderate More Details Sun Exposure: Full sun to partial shadeCold Hardiness Zone: 4Drought tolerateCan not tolerate wet soilAttracts ButterfliesLong bloomingPruning Tip: prune soon after flowering Landscape Uses: Hedge, foundation planting or garden accent