The botanical name for azalea is Rhododendron. There are two types of azaleas -- evergreen and deciduous. The evergreen variety has green leaves year-round, while the deciduous type shed their leaves and are bare during the winter months. In the early spring and summer, azalea produces small clusters of flowers that bloom in a variety of colors including pink, red, white, yellow and orange. The height of this shrub varies depending on the cultivator, but generally reaches a height of anywhere from 1 to 15 feet. To have success with azaleas, plant them in full sun or partial shade. They are hardy in United States Department of Agriculture Plant Hardiness Zones 6 through 8.
Lilacs (Syringa vulgaris) are known for their fragrant flowers. In the early spring, these deciduous shrubs, which reach an average height of 8 feet, produce dark-green foliage, which remains throughout the summer. In addition to the green foliage, flowers bloom in late spring. These flowers are actually clusters of smaller flowers that grow in a conical shape. While light purple is the color most commonly associated with lilacs, some species also produce white, pink, magenta and red blooms. The shrubs span in size from 4 to 30 feet and do best when planted in full sun and moist, well-drained soil. Lilacs are hardy in USDA Plant Hardiness Zones 3 to 8.
The Rose of Sharon (Hibiscus syriacus) is a member of the hibiscus family. In late spring, vibrant green leaves with ridged edges bloom. It is not until midsummer that these shrubs produce flowers. The Rose of Sharon blooms resemble a trumpet-shaped rose and can last until autumn. The shrub's flowers include white, pink and purple blooms. The shrub generally grows 10 to 12 feet tall and spreads 6 to 8 feet wide. Plant the Rose of Sharon in direct to partial sunlight in soil that is moist, yet well drained.