Back in spring 2021.  1 litre sized pot.  Spirea japonica Anthony Waterer is a deciduous shrub with new foliage emerging with a reddish purple tint in spring.  The foliage then changes to blue green by summer and turning to a reddish colour in autumn.  It reaches up to 90cm high and deep pink clusters of flowers emerge in late spring/summer.  The leaves have a toothed edge.  Prune in late winter/early spring.  Loves a sunny position in well drained soil.