Spiraea betulifolia 39island39 is aptly named for it creates the feeling of an island paradise in your very own garden the plant39s deciduous green foliage is attractive and compact particularly when it39s grown in bright sunny conditions the spirea is at its best in may and june when its lush leaves sport fluffy white flowers these blooms are adored by animals although thankfully these tend to be pollinating insects rather than exotic island beasts33 the shrub is there