Autumnal Blue California Lilac
Ceanothus thyrsiflorus 'Autumnal Blue'
Not currently listed at our partner nurseries.
Essentials
At a Glance
Plant Type
Shrub
Height
96 inches
Width
120 inches
Light
Full Sun, Partial Sun
Zones
8, 9
Water
Low to moderate once established
Humidity
Prefers dry to moderate humidity
Lifespan
10-15 years
Native To
California and Pacific Northwest
Toxicity
Non-toxic to humans and pets
The Story
Plant Bio
An evergreen shrub with rounded clusters of small blue flowers. Noted for its abundant blue flowers and drought tolerance.
Uses & Benefits:
Marketplace
Where to Buy
We couldn't find this plant listed online right now.
Shipping costs Year-round shipping Free shipping
Planting
How to Grow
- Select a sunny location with well-drained soil for planting.
- Tuck seeds or cuttings into soil, pressing gently for good contact.
- Water thoroughly after planting to settle soil around roots.
- Mist cuttings regularly to maintain humidity for 4-6 weeks.
- Fertilize with a balanced, slow-release fertilizer in early spring.
- Prune lightly after flowering to maintain shape and encourage growth.
Pro Tip
Ensure excellent drainage and full sun exposure for optimal flowering.
Keep It Thriving
Care Guide
Do
- Water deeply during dry spells 🌱
- Prune after flowering to shape the shrub
- Apply mulch to retain soil moisture
Don't
- Overwater to prevent root rot ❌
- Avoid heavy fertilization in late fall ❌
- Don’t prune in late summer or fall ❌
Seasonal Care Calendar
| Task | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mulch | ||||||||||||
| Plant | ||||||||||||
| Prune | ||||||||||||
| Winter Prep |
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
Autumnal Blue California Lilac questions
What zones can Autumnal Blue California Lilac grow in?
Autumnal Blue California Lilac is hardy in USDA Zones 8–10. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.
Is Autumnal Blue California Lilac deer resistant?
Yes — Autumnal Blue California Lilac is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.
When does Autumnal Blue California Lilac bloom?
Autumnal Blue California Lilac typically blooms in late summer to autumn through early summer. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.
Does Autumnal Blue California Lilac need full sun?
Autumnal Blue California Lilac does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.
Is Autumnal Blue California Lilac drought tolerant?
Yes — once established (usually after the first full season), Autumnal Blue California Lilac handles dry spells with minimal watering. Water deeply its first year to build the root system that makes that possible.
More Ceanothus to compare
New Jersey Tea
Ceanothus americanus
Valley Violet California Lilac
Ceanothus maritimus 'Valley Violet'
Victoria California Lilac
Ceanothus griseus 'Victoria'
California Lilac
Ceanothus thyrsiflorus
Skylark California Lilac
Ceanothus thyrsiflorus 'Skylark'
Dark Star California Lilac
Ceanothus x impressus 'Dark Star'
Keep exploring
Explore the genus
Collections featuring this plant
Hardy in your zone?
Grow Autumnal Blue California Lilac with confidence
See it in a design of your actual yard, get zone-matched care reminders, and track it season by season in your garden journal.
