How to Manage Pests

Pests in Gardens and Landscapes

Syringa, Lilac, Japanese tree lilac—Syringa spp.
Family Oleaceae (Olive family)

Plant identification

The best known Syringa spp. is the common lilac, Syringa vulgaris, with its fragrant, old-fashioned flower clusters in shades of lavender, pink, purple, and white. Japanese tree lilac is a larger species that can become a small tree growing to a height of 30 feet.

Optimum conditions for growth

Lilacs grow best where there is a pronounced winter chilling. Some varieties will bloom with only little chilling. In inland valleys, they do best with light shade and protection from reflected heat. In other areas, plant in full sun. All lilacs prefer alkaline soils and good drainage. Provide water during bloom and heavy growth periods.


Pests and disorders of Syringa spp.




Diseases (continued)

Environmental disorders



Statewide IPM Program, Agriculture and Natural Resources, University of California
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