Spiraea × cinerea is a species of flowering plant in the rose family.
It is a hybrid of garden origin (S. hypericifolia × S. cana).
Growing to 1.5 m (4.9 ft) tall and wide, this compact deciduous shrub bears small, lanceolate leaves and multiple white blooms along its arching stems in spring.

The Latin specific epithet cinerea means “the colour of ash”.

The cultivar ‘Grefsheim’ is widely grown as a garden plant.
Hardy down to −20 °C (−4 °F), it is easy to grow in a sunny mixed planting.
It has gained the Royal Horticultural Society’s Award of Garden Merit.
Spiraea × cinerea is a species of flowering plant in the rose family. It is a hybrid of garden origin (S. hypericifolia × S. cana). Growing to 1.5 m (4.9 ft) tall and wide, this compact deciduous shrub bears small, lanceolate leaves and multiple white blooms along its arching stems in spring.
The Latin specific epithet cinerea means “the colour of ash”. 
The cultivar ‘Grefsheim’ is widely grown as a garden plant. Hardy down to −20 °C (−4 °F), it is easy to grow in a sunny mixed planting. It has gained the Royal Horticultural Society’s Award of Garden Merit.
Spiraea × cinerea