Lilacs (Syringa) are a woody plant genus of olive trees (Oleaceae) native to Europe and Asia. There are about twenty species, in addition to which there are hybrids.

In Finland, lilacs are not wild, but when planted, the most common species is syringa (Syringa vulgaris), whose flowers are usually typical lilac or white. In Finland, lilac is used in gardens in the 19th century. Lilacs grow into multi-stemmed shrubs about 4 to 5 meters high. The leaves are opposite, lanceolate, flat. The flowers are about a centimeter in diameter. Shrubs usually bloom in June. The scent of the flowers is strong, pleasant. Lilacs grow well in a sunny place, but tolerate partial shade. Lilac is very durable, in addition, does not require complex treatment, so it is very popular.