Delaware Valley White Azalea (Rhododendron 'Delaware Valley White') is a lovely addition to any landscape. For one, white flowers are uncommon but serve as fine complements to flowers and foliage of all colors. Delaware Valley White produces pretty azalea white flowers about 2 to 4 inches in size each spring. They rise above evergreen foliage. For a showstopper, year-round hedge, plant several of the shrubs along a garden border, sidewalk, driveway or before low structures.