Dramatic rosy45red blooms form large mopheads which smother this fantastic deciduous shrub throughout summer and early autumn as autumn approaches the flowers take on more subtle deep pink tones infused with apple green as with all mophead hydrangeas the flowers change colour depending on your soil ph and will become more purple in acid soils hydrangea macrophylla 39red baron39 has a compact rounded habit which makes it superb for patio containers or a colourful highlight in borde