Habitat: Hardy from zone 3 to 7, this species prefers moist, cool climates and neutral soils supplemented with leaf mold and humus.
Diseases: A position in full sun is essential to prevent fungal diseases. The common lilac is especially susceptible to powdery mildew in wet seasons and in shady locations, but may also be attacked by other pests and diseases such as Botrytis blight and bacterial blight. They are also subject to infection by phytoplasmas.
