Japanese Tree Lilac plant profile
Syringa reticulata
A perennial tree for full sun.
Last updated .
When to plant
When to plant Japanese Tree Lilac
Plant this deciduous tree while dormant, in fall or early spring. Extension guidance rates fall (after leaf drop, with time for roots to establish) and early spring (before bud break) as the best windows; avoid planting into summer heat.
The calendar shows this cited seasonal window as an approximate band. It does not convert the season into frost-adjusted dates.
Open Japanese Tree Lilac in my garden calendarShows the source-backed planting season, not frost-adjusted dates.
Growing conditions
- Sun
- Full sun
- Soil pH
- 5 to 8
- Lifecycle
- Perennial
- Spacing
- 180 to 240 in apart
- Hardiness
- Zones 3a to 7bFind my hardiness zone
Common problems
Watch for these
Also watch for: heat intolerance in the deep south.
Next steps
Continue with Japanese Tree Lilac
Evidence trail
Evidence behind this profile
Original extension and institutional publications behind the planting, care, and safety facts on this page.
- Syringa reticulata (Japanese Tree Lilac)
North Carolina Extension Gardener Plant Toolbox (NC State Extension). Supports general reference. Checked 2026-06-18.
- Planting Trees Correctly (HGIC 1001)
Clemson Cooperative Extension, Home & Garden Information Center. Supports planting reference. Checked 2026-06-18.