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Japanese tree lilac (Syringa reticulata)

Common Name: Japanese tree lilac
Scientific Name: Syringa reticulata
Family Name: Oleaceae

Cultural Comments

Prefers a slightly acidic, well-drained soil. Can tolerate some shade but best flowering in full sun. Prune after flowering. Tolerate of urban conditions but needs good air circulation.

Native Habitat

Native to northern China and Japan. Hardy zones 3 to 7.

Growth Habit

Can be grown as a small tree or large shrub, more commonly sold as a small tree in trade. Tree form grows to 30' tall by 20' wide with a rounded to oval crown.

Leaves

Leaves are ovate with a pointed tip. Dark green, growing up to 6" long. Fall color is not ornamental.
Syringa reticulata leaves

Bark and Stems

Younger bark is shiny brown turning gray-brown with age. Horizontal lenticels.
Syringa reticulata bark

Flowers

Large upright flower panicles (up to 10") of off-white flowers. Fragrant. Late spring to early summer.
Syringa reticulata flower

Fruit

Brown capsules in large panicles.

Bloom Time

Late spring to early summer

Common Problems

No serious insect of disease problems. Does not have the problems of other lilac.Can be susceptible to blights, leaf spots, wilt, and ring spot virus. Caterpillars can cause damage.

Varieties or Cultivars

'Ivory Silk' - Blooms heavily as a young plant. Common in commerce.

Landscape Uses

Best used as a specimen tree.
Japanese tree lilac

Publications & Resources

  • Fact Sheets
  • Professional Disease Guide
  • Professional Insect & Mite Guide
  • Nursery Best Management Practices (BMP) Manual
  • Garden Calendar
  • Useful Links
  • Association Certification
  • Pesticide License Information
  • Pesticide Resources
  • Nutrient Management
  • Plant Identification
  • Weed Identification

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