• Photo of Syringa reticulata subsp. reticulata (Syringa reticulata subsp. reticulatas)

Plant Profile: Syringa reticulata subsp. reticulata

Names

Giant Tree Lilac, Japanese Tree Lilac

  • Photo of Syringa reticulata subsp. reticulata (Syringa reticulata subsp. reticulatas)

Phonetic Spelling:si-RING-gah reh-tick-yoo-LAY-tuh

Genus:Syringa

Species:reticulata

Family:Oleaceae

The Japanese Tree Lilac is a sizable shrub or diminutive tree, typically growing between 20 to 30 feet tall and spreading about 15 feet wide. In early summer, it showcases large clusters of creamy white blossoms, emitting a fragrance reminiscent of privet rather than the classic scent of spring-blooming Syringa vulgaris. Its branches extend outward, forming an oval to rounded crown that resembles a Christmas tree, being broader at the base and tapering towards the top. While it can thrive in various soil pH levels, it favors a neutral range, ideally slightly acidic to slightly alkaline. This tree can be utilized as a standalone specimen, a street tree, grouped in small clusters, or as part of a border.

Notably, it exhibits strong resistance to mildew when grown in full sunlight and is also resilient against lilac borer, especially when adequately watered during dry periods.

Syringa reticulata subsp. reticulata Feature Summary

Syringa reticulata subsp. reticulata Image Gallery

Tags

#hummingbirds
#showy flowers
#deciduous
#full sun tolerant
#fragrant flowers
#interesting bark
#specimen
#partial sun
#pyramidal
#salt tolerant
#low maintenance
#cottage garden
#flowering tree
#air pollution tolerant
#street tree
#moist soil
#well-drained soil
#neutral ph
#summer flowers
#deer resistant
#rich soil
#rounded
#borders
#alkaline soil tolerant
#pollinator plant
#compaction tolerant
#asian garden
#mildew resistant
#small group plantings
#clay soils tolerant
#butterfly friendly
#shrub borders

Similar Plants

Syringa reticulata subsp. reticulata is often confused with:

Syringa reticulata subsp. reticulata Feature Summary

Attributes
islands of Hokkaido, Honshu, Shikoko and Kyushu Japan
naturalized in the US in New York, New Hampshire, Massachusetts and Vermont, and in Ontario, Canada
Flowers support hummingbirds, bees and butterflies, particularly Purple Admiral, White Admiral, and Canadian Tiger Swallowtail.
Perennial
Woody
Fragrance
Attracts Pollinators
Shade
Screening
Attractive Flowers
Fruit
dry, oblong or ovoid, 2 cm long, green then yellow capsules, usually in large quantities
Green
Gold/Yellow
< 1 inch
Flowers
Terminal, creamy white panicles 6"-12" long, flowers in June slightly later than the shrub lilacs.
White
Cream/Tan
Spring
Summer
4-5 petals/rays
Tubular
Cross
< 1 inch
Leaves
2-6" dark green leaves, ovate with a rounded base. Reticulata: pinnate-veined, a reference to leaf veins. Leaves are non-showy in fall
Ovate
Lanceolate
Entire
Undulate
3-6 inches
1-3 inches
Bark
Shiny smooth peeling red-brown bark with horizontal lenticles, turning grey with age..
Dark Gray
Light Gray
Dark Brown
Red/Burgundy
Stem
shiny brown stems with horizontal lenticels
Brown/Copper
Whole Plant Traits
Multi-trunked
Rounded
Erect
Pyramidal
Oval
Vase
Medium
Cultural Conditions
Full sun (6 or more hours of direct sunlight a day)
Partial Shade (Direct sunlight only part of the day, 2-6 hours)
Alkaline (>8.0)
Neutral (6.0-8.0)
Good Drainage
Moist
Occasionally Dry
Mountains
Piedmont
4a
4b
5b
5a
6a
6b
7a
7b
3a
3b
Clay
High Organic Matter
Sand
Landscape
Butterfly Garden
Pollinator Garden
Cottage Garden
Asian Garden
Border
Foundation Planting
Hedge
Screen/Privacy
Small groups
Specimen
Flowering Tree
Street Tree
Small Tree
Deer
Pollution
Salt
Compaction
Dry Soil
Poor Soil
Patio
Walkways
Woodland
Lawn
Butterflies
Pollinators
Bees
Hummingbirds

Syringa reticulata subsp. reticulata Attributes

Syringa reticulata subsp. reticulata: Country Or Region Of Origin

islands of Hokkaido, Honshu, Shikoko and Kyushu Japan

Syringa reticulata subsp. reticulata: Distribution

naturalized in the US in New York, New Hampshire, Massachusetts and Vermont, and in Ontario, Canada

Syringa reticulata subsp. reticulata: Wildlife Value

Flowers support hummingbirds, bees and butterflies, particularly Purple Admiral, White Admiral, and Canadian Tiger Swallowtail.

Syringa reticulata subsp. reticulata: Life Cycle

Annual
Biennial
Bulb
Perennial
Woody

Syringa reticulata subsp. reticulata: Recommended Propagation Strategy

Division
Grafting
Layering
Leaf Cutting
Root Cutting
Seed
Stem Cutting

Syringa reticulata subsp. reticulata: Play Value

Attractive Flowers
Attracts Pollinators
Buffer
Colorful
Defines Paths
Easy to Grow
Edible fruit
Fragrance
Pieces Used in Games
Screening
Shade
Sound
Textural
Wildlife Cover/Habitat
Wildlife Food Source
Wildlife Larval Host
Wildlife Nesting
Wind Break
Wind Shimmer

Syringa reticulata subsp. reticulata Fruit

Syringa reticulata subsp. reticulata: Fruit Description

dry, oblong or ovoid, 2 cm long, green then yellow capsules, usually in large quantities

Syringa reticulata subsp. reticulata: Fruit Type

Achene
Aggregate
Berry
Capsule
Caryopsis
Drupe
Follicle
Legume
Nut
Pome
Samara
Schizocarp
Siliqua

Syringa reticulata subsp. reticulata: Fruit Color

grass
Gold/Yellow
grass
Green

Syringa reticulata subsp. reticulata: Display/Harvest Time

Fall
Spring
Summer
Winter

Syringa reticulata subsp. reticulata: Fruit Length

< 1 inch
1-3 inches
> 3 inches

Syringa reticulata subsp. reticulata: Fruit Width

< 1 inch
1-3 inches
> 3 inches

Syringa reticulata subsp. reticulata Flowers

Syringa reticulata subsp. reticulata: Flower Description

Terminal, creamy white panicles 6"-12" long, flowers in June slightly later than the shrub lilacs.

Syringa reticulata subsp. reticulata: Flower Color

filter_vintage
Cream/Tan
filter_vintage
White

Syringa reticulata subsp. reticulata: Flower Inflorescence

Catkin
Corymb
Cyme
Head
Insignificant
Panicle
Raceme
Solitary
Spadix
Spike
Umbel

Syringa reticulata subsp. reticulata: Flower Value To Gardener

Edible
Fragrant
Good Cut
Good Dried
Long Bloom Season
Long-lasting
Showy

Syringa reticulata subsp. reticulata: Flower Bloom Time

Winter
Spring
Summer
Fall

Syringa reticulata subsp. reticulata: Flower Petals

2-3 rays/petals
4-5 petals/rays
6 petals/rays
7 - 20 petals/rays
asymmetrical petals
Bracts
Colored Sepals
fused petals
more than 20 petals/rays
Tepals

Syringa reticulata subsp. reticulata: Flower Shape

Bell
Cross
Crown
Cup
Dome
Funnel
Irregular
Lipped
Radial
Saucer
Star
Trumpet
Tubular
Urn
Wheel

Syringa reticulata subsp. reticulata: Flower Size

1-3 inches
3-6 inches
< 1 inch
> 6 inches

Syringa reticulata subsp. reticulata Leaves

Syringa reticulata subsp. reticulata: Leaf Description

2-6" dark green leaves, ovate with a rounded base. Reticulata: pinnate-veined, a reference to leaf veins. Leaves are non-showy in fall

Syringa reticulata subsp. reticulata: Woody Plant Leaf Characteristics

Broadleaf Evergreen
Deciduous
Needled Evergreen
Semi-evergreen

Syringa reticulata subsp. reticulata: Leaf Color

spa
Green

Syringa reticulata subsp. reticulata: Deciduous Leaf Fall Color

spa
Insignificant

Syringa reticulata subsp. reticulata: Leaf Type

Compound (Pinnately , Bipinnately, Palmately)
Fronds
Needles
Sheath
Simple

Syringa reticulata subsp. reticulata: Leaf Arrangement

Alternate
Opposite
Other/more complex
Rosulate
Whorled

Syringa reticulata subsp. reticulata: Leaf Shape

Acicular
Auriculate
Cordate
Cuneate
Deltoid
Elliptical
Filiform
Lanceolate
Linear
Oblanceolate
Oblong
Obovate
Obtuse
Orbicular
Ovate
Palmasect
Palmatifid
Peltate
Pinnatifid
Pinnatisect
Reniform
Rhomboidal
Spatulate
Subcordate
Subulate

Syringa reticulata subsp. reticulata: Leaf Margin

Crenate
Crenulate
Dentate
Denticulate
Doubly Crenate
Doubly Dentate
Doubly Serrate
Entire
Lobed
Serrate
Sinuate
Undulate

Syringa reticulata subsp. reticulata: Hairs Present

No
Yes

Syringa reticulata subsp. reticulata: Leaf Length

< 1 inch
1-3 inches
3-6 inches
> 6 inches

Syringa reticulata subsp. reticulata: Leaf Feel

Fleshy
Glossy
Leathery
Papery
Prickly
Rough
Rubbery
Slippery
Smooth
Soft
Velvety
Waxy

Syringa reticulata subsp. reticulata: Leaf Width

< 1 inch
1-3 inches
3-6 inches
> 6 inches

Syringa reticulata subsp. reticulata Bark

Syringa reticulata subsp. reticulata: Bark Description

Shiny smooth peeling red-brown bark with horizontal lenticles, turning grey with age..

Syringa reticulata subsp. reticulata: Bark Color

grass
Dark Brown
grass
Dark Gray
grass
Light Gray
grass
Red/Burgundy

Syringa reticulata subsp. reticulata: Surface/Attachment

Bumpy
Exfoliating
Fissured
Furrowed
Lenticels
Papery
Patchy
Peeling
Ridges
Scaly
Shaggy
Shiny
Shredding
Smooth
Spongy

Syringa reticulata subsp. reticulata Stem

Syringa reticulata subsp. reticulata: Stem Description

shiny brown stems with horizontal lenticels

Syringa reticulata subsp. reticulata: Stem Color

grass
Brown/Copper

Syringa reticulata subsp. reticulata: Stem Is Aromatic

No
Yes

Syringa reticulata subsp. reticulata Whole Plant Traits

Syringa reticulata subsp. reticulata: Plant Type

Annual
Bulb
Carnivorous
Edible
Epiphyte
Fern
Ground Cover
Herb
Herbaceous Perennial
Houseplant
Mushroom
Native Plant
Ornamental Grasses and Sedges
Perennial
Poisonous
Rose
Shrub
Succulent
Tree
Turfgrass
Vegetable
Vine
Water Plant
Weed
Wildflower

Syringa reticulata subsp. reticulata: Woody Plant Leaf Characteristics

Broadleaf Evergreen
Deciduous
Needled Evergreen
Semi-evergreen

Syringa reticulata subsp. reticulata: Habit/Form

Arching
Ascending
Broad
Cascading
Climbing
Clumping
Columnar
Conical
Creeping
Dense
Erect
Horizontal
Irregular
Mounding
Multi-stemmed
Multi-trunked
Open
Oval
Prostrate
Pyramidal
Rounded
Spreading
Vase
Weeping

Syringa reticulata subsp. reticulata: Growth Rate

Slow
Medium
Rapid

Syringa reticulata subsp. reticulata: Maintenance

Low
Medium
High

Syringa reticulata subsp. reticulata: Texture

Fine
Medium
Coarse

Syringa reticulata subsp. reticulata Cultural Conditions

Syringa reticulata subsp. reticulata: Light

Dappled Sunlight (Shade through upper canopy all day)
Deep shade (Less than 2 hours to no direct sunlight)
Full sun (6 or more hours of direct sunlight a day)
Partial Shade (Direct sunlight only part of the day, 2-6 hours)

Syringa reticulata subsp. reticulata: Soil pH

Acid (<6.0)
Alkaline (>8.0)
Neutral (6.0-8.0)

Syringa reticulata subsp. reticulata: Soil Drainage

Frequent Standing Water
Good Drainage
Moist
Occasional Flooding
Occasionally Dry
Occasionally Wet
Very Dry

Syringa reticulata subsp. reticulata: Available Space To Plant

12 inches-3 feet
12-24 feet
24-60 feet
3 feet-6 feet
6-feet-12 feet
Less than 12 inches
more than 60 feet

Syringa reticulata subsp. reticulata: NC Region

Coastal
Mountains
Piedmont

Syringa reticulata subsp. reticulata: USDA Plant Hardiness Zone

thermostat
3a
thermostat
3b
thermostat
4a
thermostat
4b
thermostat
5a
thermostat
5b
thermostat
6a
thermostat
6b
thermostat
7a
thermostat
7b

Syringa reticulata subsp. reticulata: Soil Texture

Clay
High Organic Matter
Loam (Silt)
Sand
Shallow Rocky

Syringa reticulata subsp. reticulata Landscape

Syringa reticulata subsp. reticulata: Landscape Theme

Asian Garden
Butterfly Garden
Children's Garden
Cottage Garden
Cutting Garden
Drought Tolerant Garden
Edible Garden
English Garden
Fairy Garden
Garden for the Blind
Native Garden
Nighttime Garden
Pollinator Garden
Rain Garden
Rock Garden
Shade Garden
Water Garden
Winter Garden

Syringa reticulata subsp. reticulata: Design Feature

Accent
Barrier
Border
Flowering Tree
Foundation Planting
Hedge
Mass Planting
Screen/Privacy
Security
Shade Tree
Small groups
Small Tree
Specimen
Street Tree
Understory Tree

Syringa reticulata subsp. reticulata: Resistance To Challenges

Black Walnut
Compaction
Deer
Diseases
Drought
Dry Soil
Erosion
Fire
Foot Traffic
Heat
Heavy Shade
Humidity
Insect Pests
Pollution
Poor Soil
Rabbits
Salt
Slugs
Squirrels
Storm damage
Urban Conditions
Voles
Wet Soil
Wind

Syringa reticulata subsp. reticulata: Landscape Location

Coastal
Container
Hanging Baskets
Houseplants
Lawn
Meadow
Naturalized Area
Near Septic
Patio
Pond
Pool/Hardscape
Recreational Play Area
Riparian
Rock Wall
Slope/Bank
Small Space
Vertical Spaces
Walkways
Woodland

Syringa reticulata subsp. reticulata: Attracts

Bats
Bees
Butterflies
Frogs
Hummingbirds
Moths
Pollinators
Predatory Insects
Reptiles
Small Mammals
Songbirds
Specialized Bees