Spiraea japonica ‘Candlelight’ (syn. S. x bumalda ‘Candlelight’) – This deciduous shrub produces clusters of deep rose flowers in early summer beautifully contrasted by butter yellow leaves. The foliage matures to a yellowish-green that takes on reddish tones in autumn. This RHS Award of Garden Merit winner prefers part to full sun. Grows 2 to 3′ high by 3 to 4′ wide. Hardy to zone 4.
Spiraea japonica ‘Anthony Waterer’ (syn. Spiraea x bumalda ‘Anthony Waterer’) – An old standard with 4″ wide clusters of crimson-pink flowers (from July to September) over green foliage that is occasionally variegated in cream or pink. The leaves emerge with a red tint and shift to burgundy in the fall. 20 year lifespan. Grows 3 to 4′ high and wide. Hardy to zone 4.
Spiraea nipponica ‘Snowmound’ (syn. Spiraea nipponica var. tosaensis) – A very popular Spiraea with elegant arching branches smothered in small round clusters of pure white flowers in June and July. These are nicely contrasted by the bluish-green foliage which turns yellow in autumn. To reduce size, prune after flowering. Grows 3 to 4′ high and wide. AGM. Hardy to zone 4.
Spiraea japonica ‘Little Princess’ – A compact Spiraea that is useful in foundation beds and forms a nice dense rounded shrub. It bears clusters of pale pink blooms over mid green foliage (which turn a coppery-bronze in fall) from June to July. This shrub is quite often seen in commercial landscapes where it is grown as an informal flowering hedge. Grows 2.5′ high by 3′ wide. Zone 3.
Spiraea japonica ‘Magic Carpet’ (syn. Spiraea x bumalda ‘Magic Carpet’, ‘Walbuma’) – ‘Magic Carpet’ undergoes a spectacular transformation from spring to early summer, with the leaves emerging a luminous reddish-orange and then shifting to a bright golden-yellow by early summer, by which time it blooms with its intense magenta-pink flowers. Grows 2′ high by 3′ wide. Zone 3.