Spiraea japonica ‘Genpei (Shirobana)’ is a compact shrub grown for its distinctive, multi-coloured summer display. From early to mid-summer, the plant produces clusters of flowers in varying shades of white and pink, often with different colours appearing on the same shrub at the same time. This natural variation creates a lively, changing effect that sets it apart from single-colour spiraeas. The fresh green foliage forms a neat, rounded framework that keeps the plant looking tidy throughout the season. Easy to grow and simple to maintain, ‘Genpei (Shirobana)’ is well suited to borders or container planting where long-lasting colour and visual interest are needed without demanding care.