
Ivory Silk Japanese Tree Lilac
Syringa reticulata 'Ivory Silk'
Essentials
At a Glance
Plant Type
Tree
Height
300 inches
Width
180 inches
Light
Full Sun
Zones
4, 5, 6, 7
Water
Medium
Humidity
Average
Lifespan
Medium
Native To
Japan, Northern China
Toxicity
Non-toxic
The Story
Plant Bio
Japanese Tree Lilac is a small, deciduous tree or large shrub valued for its large, fragrant panicles of creamy white flowers that bloom in early summer, later than most other lilacs. It has attractive, cherry-like, reddish-brown bark. 'Ivory Silk' is a popular cultivar that is more compact, has a stronger oval to rounded form, and flowers more profusely at a younger age than the species. Its flower panicles are exceptionally large and showy.
Bloom Period:
Uses & Benefits:
Marketplace
Where to Buy
Shipping costs Year-round shipping Free shipping
Planting
How to Grow
- Select a site in full sun with good air circulation
- Ensure the soil is well-drained; amend if necessary
- Dig a hole twice the width of the container
- Plant at the same depth as it was growing in the pot
- Water well after planting to settle the soil
- Mulch to keep roots cool and conserve moisture
Pro Tip
Prune immediately after flowering is finished, as it sets flower buds for the next year during the summer.
Keep It Thriving
Care Guide
Do
- Water regularly until established, and during dry spells.
- Remove spent flower heads to keep the plant looking tidy.
- Prune to shape and remove any suckers right after blooming.
Don't
- Do not plant in wet, poorly drained soil.
- Do not prune in late summer, fall, or winter, or you will remove next year's flowers.
- Do not over-fertilize, which can reduce flowering.
Seasonal Care Calendar
| Task | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Fertilize | ||||||||||||
| Plant | ||||||||||||
| Prune |
Watch Out For
Pests & Diseases
Common Pests
Common Diseases
In the Garden
Landscape Uses & Companions
Landscape Uses
Companion Plants
Multiply
Propagation Methods
Good to Know
Common Questions
Ivory Silk Japanese Tree Lilac questions
What zones can Ivory Silk Japanese Tree Lilac grow in?
Ivory Silk Japanese Tree Lilac is hardy in USDA Zones 4–7. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.
Is Ivory Silk Japanese Tree Lilac deer resistant?
Yes — Ivory Silk Japanese Tree Lilac is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.
When does Ivory Silk Japanese Tree Lilac bloom?
Ivory Silk Japanese Tree Lilac typically blooms in early summer through mid-summer. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.
Does Ivory Silk Japanese Tree Lilac need full sun?
Ivory Silk Japanese Tree Lilac does best in full sun (6+ hours).
Is Ivory Silk Japanese Tree Lilac drought tolerant?
Yes — once established (usually after the first full season), Ivory Silk Japanese Tree Lilac handles dry spells with minimal watering. Water deeply its first year to build the root system that makes that possible.
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