For gardeners looking for a shrub with white flowers hydrangea macrophylla 39blushing bride39 is the perfect choice this hydrangea has gorgeous pure white flowerheads full of semi double flowers that mature to a delicate pink blush or pale powder blue depending on the acidity levels of the soil part of the 39endless summer39 range they flower from may until september this neat and compact shrub will provide months of colour and in autumn the foliage turns to red and yellow th