Spiraea betulifolia 39tor39 is a charming little shrub with a tidy rounded habit it produces flattened groups of pretty white flowers between may and july that attract bees and butterflies in abundance the thick framework of spiraea betulifolia 39tor39 is covered by birch45like foliage as summer turns to autumn the rich green leaves change to rich shades of crimson mauve and orange this hardy perennial shrub reaches one metre in height and is perfect for low hedging and i