Syringa reticulata
Japanese Tree Lilac
Oleaceae
ExpandHabitat
- native to northern Japan
- hardy to zone 3
- plant does not like warm climates
Habit and Form
- a deciduous large shrub or small tree
- stiff, spreading branches
- rounded crown
- 20' to 30' tall
- 15' to 25' wide
- medium growth rate
- medium texture
Summer Foliage
- opposite arranged leaves
- simple, entire leaves
- 2" to 5" long
- rounded leaf base
- dark green leaf color
- leafs out early in spring
Autumn Foliage
- poor fall color
Flowers
- off-white flowers
- fragrant
- blooms in early summer
- flowers are borne in large terminal panicles
- panicles are up to a foot long
- panicles can be up to 10" wide
- showy
Fruit
- capsules borne in large panicles
- capsules have a blunt tip
- capsules are a tan color
- somewhat ornamental
Bark
- color is a gray-brown
- stout stems, that are shiny brown
- horizontal lenticels
Culture
- full sun
- transplants easily
- prefers well-drained, slightly acidic soil
- prune after flowering
- cut off old flower heads
- somewhat resistant to mildew, scales and borers
Landscape Use
- specimen
- street tree
- small groupings
- for flowering effect
- for high quality foliage and form
Liabilities
- does not have as severe of a pest problem as other Lilacs
- caterpillars
ID Features
- always white flowers in large panicles
- very large panicles of fruit capsules
- opposite leaf arrangement
- shiny brown stems with horizontal lenticels
- buds have 4 pairs of scales and are brown and sessile
Propagation
- by cuttings
- by seed
Cultivars/Varieties
'Chantilly Lace' - A form with variegated foliage, the leaves of this plant feature a pale creamy yellow perimeter. It will benefit from siting out of direct afternoon sun and good irrigation during drought. 'Cameo Jewel' is a new variegated form with yellow-cream splashed foliage.
'Ivory Silk' - This selection forms a pleasant, rounded tree to 25' tall with stocky branch structure. It is very common in commerce and blooms heavily, even as a young plant. The healthy, deep green leaves are not bothered by pests and the cherry-esque bark is attractive all year.
'Summer Snow' - A more compact, rounded tree, this form reaches 20' tall with ample production of very large flower panicles. Its toughness and small size may make the plant a good street tree.