Common Names. This shrub may be found as common lilac, French lilac or just lilac. Preferred USDA Hardiness Zones. The lilac will flourish in Zones 3-7. It originally comes from the Balkan Peninsula in Europe. Size & Shape. Common lilacs will be anywhere from 8-20' tall and 6-12' wide, depending on what variety you have planted.
Lilacs are a flowering plant known for their plentiful purple petals and fragrant scent. In the past, lilacs were used to treat certain ailments, although the medical use of these flowers is no longer commonly practiced. Those who practice aromatherapy, however, believe the scent of lilacs has numerous health benefits.
According to Dirr's book Hardy Trees and Shrubs, this lilac is comparable to Syringa x persica, Persian Lilac in most characteristics except the leaves. He says it bears reasonable flowers in partial shade, and that it is one of the most heat tolerant.
Syringa × persica, the Persian lilac, is a hybrid, thought to originate from a cross of Syringa × laciniata and S. afghanica. Its height grows up to 4–8 ft and spreads about 5–10 ft, and prefers warmer winter climates (Zones 5–9) than many species of lilac. This is a different plant than Melia azedarach, also sometimes called Persian lilac.
In tree form, it grows to 30’ tall and 20’ wide with an oval-rounded crown. Its best ornamental feature is its showy, fragrant, creamy white flowers which bloom in upright panicles to 12” long in late spring to early summer (later than most other lilac species). Some gardeners dislike the privet-like smell of the flowers.