This is probably the Ghent azalea called Tricolor van Aken which is a deciduous shrub with relatively dainty white flowers, shaded with pale purple. The leaves turn to good autumn colours.
Flower Colour :
Flowering Time : May
Scented : No
Ultimate Height : 2.00 metres / 6 feet 6 inches
Group : Azaleas - Deciduous (Ghent)