Common lilac bushes (Syringa vulgaris) are deciduous shrubs that bloom in the springtime. They are part of the olive family, along with other such ornamental plants as ash trees, forsythia bushes, and privet hedges. The outstanding quality of many lilac varieties is the sweet fragrances of their flowers. The blooms appear in branching clusters or panicles. Each flower is only about 1/3 inch across. The leaves are gray-green to blue-green in color and reach around 2 to 5 inches long; they do not change color in the fall. And the bark of this shrub is gray to grayish brown. The best time to plant lilac bushes is in the early fall before the ground freezes. They have a moderate growth rate of 1 to 2 feet per year.
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