Ivory Silk Japanese Lilac

Botanical Name: Syringa reticulata ‘Ivory Silk’

Common Name: Ivory Silk Japanese Tree Lilac

Mature Height and Width:
20–30' tall × 15–20' wide

Growth Habit: Upright oval to broadly rounded small tree with strong central leader. Well-spaced ascending scaffold branches. Moderate growth rate. More tree-form and less suckering than common lilac.

Foliage Description: Medium to dark green ovate leaves with smooth margins. Leaves larger and glossier than Syringa vulgaris. Moderate canopy density with visible branching structure.

Flower Description: Large creamy-white panicles held upright at branch tips. Panicles broad and somewhat conical, appearing in dense clusters across upper canopy. Fragrant.

Bloom Time: Early to mid-summer (later than common lilac).

Fall Color: Yellow to yellow-brown; not highly ornamental.

Light Requirements: Full sun for best flowering and canopy structure.

Hardiness Zone: USDA Zones 3–7 (reliable in Northeast Zones 5–7).

Notable Landscape Uses: Street tree; lawn specimen; patio shade tree; late-season flowering accent; urban planting.

Deer Resistance: Moderate
New growth may experience browsing in Northeast Zones 5–7 but generally less preferred than common lilac.