A white flower variety of Spiraea, Grefsheim is most striking in the spring, when it is completely enveloped by tiny blossoms. Dainty, pure white flowers with yellow centers are borne in clusters, and they completely cover this compact shrub, attracting bees and butterflies to your garden. During summer and autumn, the greyish-green, lanceolate leaves offer interest, densely amassed on arching branches. In the autumn, the foliage turns to copper and yellow. 
A hybrid of Norwegian origin, Spirea Grefsheim is pest and disease free, and can survive temperatures as low as -20 degrees. Fully hardy in Britain and Ireland, this flowering shrub is also the recipient of the prestigious Award of Garden Merit by Royal Horticultural Society.  Generally considered low-maintenance, this compact shrub with a bushy habit requires little pruning. Spirea Grefsheim forms an elegant mound naturally, 1 to 1.5 metres tall and wide.